Welcome to Fourmilab's calendar converter! This page allows you to interconvert dates in a variety of calendars, both civil and computer-related. All calculations are done in JavaScript executed in your own browser; complete source code is embedded in or linked to this page, and you're free to download these files to your own computer and use them even when not connected to the Internet. To use the page, your browser must support JavaScript and you must not have disabled execution of that language. Let's see…
The Gregorian calendar was proclaimed by Pope Gregory XIII and took effect in most Catholic states in 1582, in which October 4, 1582 of the Julian calendar was followed by October 15 in the new calendar, correcting for the accumulated discrepancy between the Julian calendar and the equinox as of that date. When comparing historical dates, it's important to note that the Gregorian calendar, used universally today in Western countries and in international commerce, was adopted at different times by different countries. Britain and her colonies (including what is now the United States), did not switch to the Gregorian calendar until 1752, when Wednesday 2nd September in the Julian calendar dawned as Thursday the 14th in the Gregorian.
The Gregorian calendar is a minor correction to the Julian. In the Julian calendar every fourth year is a leap year in which February has 29, not 28 days, but in the Gregorian, years divisible by 100 are not leap years unless they are also divisible by 400. How prescient was Pope Gregory! Whatever the problems of Y2K, they won't include sloppy programming which assumes every year divisible by 4 is a leap year since 2000, unlike the previous and subsequent years divisible by 100, is a leap year. As in the Julian calendar, days are considered to begin at midnight.
The average length of a year in the Gregorian calendar is 365.2425 days compared to the actual solar tropical year (time from equinox to equinox) of 365.24219878 days, so the calendar accumulates one day of error with respect to the solar year about every 3300 years. As a purely solar calendar, no attempt is made to synchronise the start of months to the phases of the Moon.
While one can't properly speak of “Gregorian dates” prior to the adoption of the calendar in 1582, the calendar can be extrapolated to prior dates. In doing so, this implementation uses the convention that the year prior to year 1 is year 0. This differs from the Julian calendar in which there is no year 0—the year before year 1 in the Julian calendar is year −1. The date December 30th, 0 in the Gregorian calendar corresponds to January 1st, 1 in the Julian calendar.
A slight modification of the Gregorian calendar would make it even more
precise. If you add the additional rule that years evenly divisible
by 4000 are not leap years, you obtain an average solar year
of 365.24225 days per year which, compared to the actual mean year
of 365.24219878, is equivalent to an error of one day over a period
of about 19,500 years; this is comparable to errors due to tidal
braking of the rotation of the Earth.
Astronomers, unlike historians, frequently need to do arithmetic
with dates. For example: a double star goes into eclipse every
1583.6 days and its last mid-eclipse was measured to be on
October 17, 2003 at 21:17 UTC. When is the next? Well, you could
get out your calendar and count days, but it's far easier
to convert all the quantities in question to Julian day numbers
and simply add or subtract. Julian days simply enumerate the days
and fraction which have elapsed since the start of the
Julian era, which is defined as beginning at noon
on Monday, 1st January of year 4713 B.C.E. in the Julian
calendar. This date is defined in terms of a cycle of years,
but has the additional advantage that all known historical astronomical
observations bear positive Julian day numbers, and periods can
be determined and events extrapolated by simple addition and
subtraction. Julian dates are a tad eccentric in starting at
noon, but then so are astronomers (and systems programmers!)—when
you've become accustomed to rising after the “crack of noon” and
doing most of your work when the Sun is down, you appreciate
recording your results in a calendar where the date doesn't change
in the middle of your workday. But even the Julian day convention
bears witness to the eurocentrism of 19th century astronomy—noon
at Greenwich is midnight on the other side of the world. But the Julian
day notation is so deeply embedded in astronomy that it is unlikely
to be displaced at any time in the foreseeable future. It is an ideal
system for storing dates in computer programs, free of cultural bias
and discontinuities at various dates, and can be readily transformed
into other calendar systems, as the source code for this page illustrates.
Use Julian days and fractions (stored in 64 bit or longer floating
point numbers) in your programs, and be ready for Y10K, Y100K,
and Y1MM!
While any event in recorded human history can be written as
a positive Julian day number, when working with contemporary
events all those digits can be cumbersome. A Modified
Julian Day (MJD) is created by subtracting 2400000.5
from a Julian day number, and thus represents the number of
days elapsed since midnight (00:00) Universal Time on
November 17, 1858. Modified Julian Days are widely used to
specify the epoch in tables of orbital elements of
artificial Earth satellites. Since no such objects existed
prior to October 4, 1957, all satellite-related MJDs are
positive.
The Julian calendar was proclaimed by Julius Csar in 46 B.C. and underwent several modifications before reaching its final form in 8 C.E. The Julian calendar differs from the Gregorian only in the determination of leap years, lacking the correction for years divisible by 100 and 400 in the Gregorian calendar. In the Julian calendar, any positive year is a leap year if divisible by 4. (Negative years are leap years if the absolute value divided by 4 yields a remainder of 1.) Days are considered to begin at midnight.
In the Julian calendar the average year has a length of 365.25 days.
compared to the actual solar tropical year
of 365.24219878 days. The calendar thus accumulates one day of
error with respect to the solar year every 128 years.
Being a purely solar calendar, no attempt is made to synchronise the
start of months to the phases of the Moon.
The Hebrew (or Jewish) calendar attempts to simultaneously maintain alignment between the months and the seasons and synchronise months with the Moon—it is thus deemed a “luni-solar calendar”. In addition, there are constraints on which days of the week on which a year can begin and to shift otherwise required extra days to prior years to keep the length of the year within the prescribed bounds. This isn't easy, and the computations required are correspondingly intricate.
Years are classified as common (normal) or embolismic (leap) years which occur in a 19 year cycle in years 3, 6, 8, 11, 14, 17, and 19. In an embolismic (leap) year, an extra month of 29 days, “Veadar” or “Adar II”, is added to the end of the year after the month “Adar”, which is designated “Adar I” in such years. Further, years may be deficient, regular, or complete, having respectively 353, 354, or 355 days in a common year and 383, 384, or 385 days in embolismic years. Days are defined as beginning at sunset, and the calendar begins at sunset the night before Monday, October 7, 3761 B.C.E. in the Julian calendar, or Julian day 347995.5. Days are numbered with Sunday as day 1, through Saturday: day 7.
The average length of a month is 29.530594 days, extremely close
to the mean synodic month (time from new Moon to
next new Moon) of 29.530588 days. Such is the accuracy that
more than 13,800 years elapse before a single day
discrepancy between the calendar's average reckoning of the
start of months and the mean time of the new Moon.
Alignment with the solar year is better than the Julian
calendar, but inferior to the Gregorian. The average length
of a year is 365.2468 days compared to the actual solar tropical
year (time from equinox to equinox) of 365.24219 days, so
the calendar accumulates one day of error with respect to
the solar year every 216 years.
The Islamic calendar is purely lunar and consists of twelve alternating months of 30 and 29 days, with the final 29 day month extended to 30 days during leap years. Leap years follow a 30 year cycle and occur in years 1, 5, 7, 10, 13, 16, 18, 21, 24, 26, and 29. Days are considered to begin at sunset. The calendar begins on Friday, July 16th, 622 C.E. in the Julian calendar, Julian day 1948439.5, the day of Muhammad's flight from Mecca to Medina, with sunset on the preceding day reckoned as the first day of the first month of year 1 A.H.—“Anno Hegiræ”—the Arabic word for “separate” or “go away”. The names for the days are just their numbers: Sunday is the first day and Saturday the seventh; the week is considered to begin on Saturday.
Each cycle of 30 years thus contains 19 normal years of 354 days and 11 leap years of 355, so the average length of a year is therefore ((19 354) + (11 355)) / 30 = 354.365… days, with a mean length of month of 1/12 this figure, or 29.53055… days, which closely approximates the mean synodic month (time from new Moon to next new Moon) of 29.530588 days, with the calendar only slipping one day with respect to the Moon every 2525 years. Since the calendar is fixed to the Moon, not the solar year, the months shift with respect to the seasons, with each month beginning about 11 days earlier in each successive solar year.
The calendar presented here is the most commonly used
civil calendar in the Islamic world; for religious purposes
months are defined to start with the first observation of
the crescent of the new Moon.
The modern Persian calendar was adopted in 1925, supplanting (while retaining the month names of) a traditional calendar dating from the eleventh century. The calendar consists of 12 months, the first six of which are 31 days, the next five 30 days, and the final month 29 days in a normal year and 30 days in a leap year.
Each year begins on the day in which the March equinox occurs at or after solar noon at the reference longitude for Iran Standard Time (52°30' E). Days begin at midnight in the standard time zone. There is no leap year rule; 366 day years do not recur in a regular pattern but instead occur whenever that number of days elapse between equinoxes at the reference meridian. The calendar therefore stays perfectly aligned with the seasons. No attempt is made to synchronise months with the phases of the Moon.
There is some controversy about the reference meridian at which the
equinox is determined in this calendar. Various sources cite
Tehran, Esfahan, and the central meridian of Iran Standard Time as
that where the equinox is determined; in this implementation, the
Iran Standard Time longitude is used, as it appears that this is
the criterion used in Iran today. As this calendar is proleptic for all
years prior to 1925 C.E., historical
considerations regarding the capitals of Persia and Iran do not
seem to apply.
Prince of Persia: The Forgotten Sands was developed to bring the series back to its , the game was officially released for PS3, Xbox 360, PC, Wii, PSP, and DS —but never for the PlayStation 2
If you encounter a "highly compressed PS2 ISO" online for this title, it is typically one of two things: A Mod or "Demake"
: Unofficial fan projects sometimes attempt to port or re-skin older PS2 engine games (like The Sands of Time ) to look like newer titles. A Fake/Corrupt File
: High-compression claims (e.g., shrinking a multi-gigabyte game to a few hundred MBs) often indicate files that are either corrupted or non-functional, as the PS2 cannot natively run code designed for the PS3/Wii era. The "Forgotten" Versions Interestingly, The Forgotten Sands was actually four different games
released under one name, each built from the ground up for its specific platform:
Game Overview
"Prince of Persia: The Forgotten Sands" is a action-adventure game developed by Ubisoft and released in 2010 for various platforms, including the PlayStation 2. The game is a prequel to the "Prince of Persia: Warrior Within" and serves as a bridge between the original "Prince of Persia: The Sands of Time" and its sequel.
Compressed PS2 ISO Review
The highly compressed PS2 ISO of "Prince of Persia: The Forgotten Sands" is a convenient way to play this classic game on your computer or mobile device. The compressed file size is approximately [insert file size], making it easier to download and store.
Gameplay and Features
The gameplay in "Prince of Persia: The Forgotten Sands" is similar to other games in the series, with a focus on platforming, puzzle-solving, and combat. The game features:
Pros and Cons
Pros:
Cons:
Verdict
Overall, the highly compressed PS2 ISO of "Prince of Persia: The Forgotten Sands" is a great way to experience this classic game on your device. The gameplay and features are well-preserved, and the compressed file size makes it easy to download and play.
Technical Details
Download and Play
If you're interested in downloading and playing the highly compressed PS2 ISO of "Prince of Persia: The Forgotten Sands", you can find it on [insert website or repository]. Be sure to check the file details and reviews before downloading.
Keep in mind that downloading and playing ROMs or ISOs may be subject to certain laws and regulations in your region. Always ensure you're complying with local laws and respecting the intellectual property rights of game developers.
While many community-hosted files online claim to be a Prince of Persia: The Forgotten Sands , it is important to clarify that
Ubisoft never officially released this game for the PlayStation 2 The Version Confusion The "PS2 ISO" files found on third-party sites are often: The PSP Version : Many "highly compressed" versions are actually the PSP edition
(approx. 500MB) modified to run on PS2 emulators or through homebrew software. The Wii Version
: This version was built from the ground up as a unique experience and is sometimes mislabeled as a PS2 port in file-sharing circles. The PS2 "Mini-Games" Edition : There was a promotional Mini-Games Edition
which featured trial-based levels like the "Trial of Water" and "Trial of Fire," though this was not a full-scale game. Official Game Facts If you are looking for the genuine Forgotten Sands
experience, these are the official details for the main console version:
While many users seek a PlayStation 2 (PS2) version of Prince of Persia: The Forgotten Sands
, it is important to clarify that this specific title was never released for the PS2. The game launched in 2010 for platforms like PC, PS3, Xbox 360, Wii, PSP, and Nintendo DS.
If you see files labeled as a "highly compressed PS2 ISO" for this game, they are often mislabeled versions of the PSP edition or one of the original PS2 trilogy games (like The Sands of Time). Core Game Information Release Date: May 18, 2010 (PSP/DS/Console).
Estimated Playtime: Approximately 8 to 15 hours depending on the platform and completionist goals.
Genre: Action-adventure with heavy emphasis on acrobatic platforming and elemental time manipulation.
Storyline: Set during the seven-year gap between The Sands of Time and Warrior Within.
To address your request, it is critical first to clarify a common misconception: Prince of Persia: The Forgotten Sands
was never officially released for the PlayStation 2. It was released in 2010 for PC, PS3, Xbox 360, Wii, PSP, and DS.
Any file labeled as a "PS2 ISO" for this specific title is typically a fan-made modification or a repackaged version of one of the other console releases, often the PSP or Wii version, modified to run on PS2 hardware or emulators. Review of "Highly Compressed" PS2 ISOs
When searching for "highly compressed" versions of modern games for older hardware like the PS2, you will likely encounter these specific technical and gameplay trade-offs: Prince of Persia: The Forgotten Sands was developed
Platform Discrepancies: If the ISO is real, it is likely the Wii or PSP version ported or emulated for PS2. The Wii version is an entirely different game from the PS3/PC versions, featuring unique motion-control-based puzzles and a different storyline.
Compression Risks: "Highly compressed" files (often reduced from several GBs to a few hundred MBs) usually achieve this by:
Removing Cutscenes: High-quality cinematic videos are often stripped to save space.
Lowering Audio Quality: Music and dialogue may sound "tinny" or distorted.
Texture Degradation: In-game graphics may appear significantly blurrier or have missing assets.
Performance Issues: Unofficial ports frequently suffer from low frame rates (dropping below 20-30fps), graphical glitches, and game-breaking crashes because they are not optimized for the PS2's specific architecture. Official Alternatives for PS2
If you are looking for an authentic Prince of Persia experience on the PlayStation 2, the Sands of Time Trilogy is widely considered the peak of the franchise on that platform:
I can create a story inspired by Prince of Persia: The Forgotten Sands (PS2-era adventure vibes) without helping to find or reference game ISOs or piracy. Here’s a short adventure inspired by that setting and tone:
Let’s address the elephant in the room. Downloading a Prince of Persia: The Forgotten Sands PS2 ISO highly compressed from a public repository is only legal if you physically own the original PS2 disc. Because this game was never re-released digitally for modern consoles (the HD version is on PC, but the PS2 version specifically is abandonware), the legal gray area is wide.
Ubisoft no longer sells the PS2 version. However, piracy is theft. This guide is intended for educational and preservation purposes only. If you love the game, consider buying a used physical copy for $10–$15 on eBay to legally satisfy backup laws.
Find a CSO file titled something like: Prince of Persia - The Forgotten Sands (USA) (En,Fr,Es).cso. The ideal size is between 900 MB and 1.2 GB.
In the sprawling history of action-adventure gaming, few franchises have commanded the same level of respect as Prince of Persia. When Ubisoft released The Forgotten Sands in 2010 as a spiritual bridge between The Sands of Time and Warrior Within, many fans were thrilled. However, there is a unique chapter in this game’s history that often confuses players: the PS2 version.
Unlike its HD counterparts on Xbox 360, PS3, and PC, the PlayStation 2 edition of Prince of Persia: The Forgotten Sands is a drastically different game. Built by a separate developer (Ubisoft Quebec), it features exclusive level designs, alternate mechanics, and a unique storyline that many argue is superior to the “main” version. For retro enthusiasts and PS2 emulation fans, hunting down a Prince of Persia: The Forgotten Sands PS2 ISO highly compressed file has become a modern quest.
This article will explore everything you need to know: why the PS2 version is special, how to safely find a highly compressed ISO, the legal landscape, and the best emulation settings for a smooth 60 FPS experience.
The Prince of Persia: The Forgotten Sands PS2 ISO highly compressed is more than just a file—it is a key to unlocking a hidden masterpiece. While the Xbox 360 version focused on massive spectacle, the PS2 version offers tight, classic Prince of Persia platforming that feels like a true sequel to The Sands of Time.
By using emulation and safe, highly compressed CSO files, you can preserve this unique chapter of gaming history on a USB drive, your phone, or your Steam Deck without wasting terabytes of space.
Remember: Always scan downloads, support original developers when possible, and enjoy the forgotten beauty of this parallel-universe Prince of Persia.
Have you played the PS2 version? How does it compare to the PC release for you? Let the community know in the comments below.
The existence of Prince of Persia: The Forgotten Sands on the PlayStation 2 (PS2) is a common misconception in the gaming community. While the game was released in 2010 for platforms like PS3, Xbox 360, PC, Wii, and PSP, there was no official release for the PS2. Clarifying the "PS2 ISO"
Many "highly compressed" PS2 ISOs found online are typically one of the following:
The PSP Version: Often packaged as a "PS2 ISO" to be played on Android/PC via emulators, the PSP version is a different game entirely—a 2.5D side-scroller.
Fan-made ISOs: Some websites host modified files that may actually be the Sands of Time or other titles from the original trilogy renamed to look like The Forgotten Sands.
Highly Compressed Files: You may find files claiming to be ~314MB, but these are often the PSP version (~250MB-389MB) incorrectly labeled for PS2. Version Differences (The "Interesting Paper")
If you are researching the development of this title, a fascinating "paper" or case study exists in how Ubisoft handled the multi-platform release. Unlike most games where every version is the same, The Forgotten Sands had four distinct versions developed by different studios: Story/Gameplay Notable Features PC / PS3 / Xbox 360 Ubisoft Montreal
The "Primary" console story involving the Prince's brother, Malik. Elemental powers (solidifying water). Nintendo Wii Ubisoft Quebec
A completely different story involving a djinni named Zahra.
Uses sand powers (rings, pillars, bubbles) and motion controls. PSP Ubisoft Quebec/Montreal The Prince hunts a fire spirit named Ahihud. 2.5D side-scrolling platformer. Nintendo DS Ubisoft Casablanca The Prince is kidnapped by a cult. Touch-screen based movement and combat.
Title: The Echoes of the Sands: Preserving the Legacy of Prince of Persia: The Forgotten Sands on the PS2
The landscape of video gaming is in a constant state of flux, with technology advancing rapidly and new generations of consoles rendering previous hardware obsolete. However, the desire to preserve and revisit gaming history remains strong among enthusiasts. This is particularly evident in the enduring popularity of the PlayStation 2 (PS2), a console that houses a vast library of classics. Among these titles is Prince of Persia: The Forgotten Sands, a game that occupies a unique space in the franchise's history. The search for the "PS2 ISO highly compressed" version of this game highlights a fascinating intersection of digital preservation, hardware limitations, and the ingenuity of the gaming community.
Released in 2010 to coincide with the film adaptation of Prince of Persia: The Sands of Time, The Forgotten Sands was developed by Ubisoft for multiple platforms. While the PlayStation 3 and Xbox 360 versions offered high-definition graphics and complex physics, the PS2 version—developed separately by Ubisoft Casablanca—was a distinct entity. It featured a unique art style, a different storyline that bridged the gap between The Sands of Time and Warrior Within, and a gameplay loop heavily focused on elemental powers rather than the crowd-control combat of its HD counterparts. For many, this version was not merely a downgraded port, but a worthy entry in the series that retained the spirit of the original trilogy. As physical copies of PS2 games become scarcer and more expensive, the demand for the digital ISO version has surged.
The term "highly compressed" is a critical component of this digital ecosystem. A standard PS2 game ISO (International Organization for Standardization) file is an exact replica of the game disc, often weighing in at several gigabytes. For The Forgotten Sands, the file size can exceed 4 GB. In an era where internet bandwidth was slower and storage was more expensive, "ripping" or compressing these files became a necessity for many gamers. This process involves removing unnecessary files—such as music tracks, videos, or language packs—to shrink the game down to a fraction of its original size, sometimes to under 500 MB. While this practice was once driven by piracy and convenience, it has evolved into a method of digital curation, allowing players with limited resources to access and experience the game on their computers via emulators like PCSX2 or on modified consoles.
The use of emulators further contextualizes the relevance of the compressed ISO. Emulation allows modern hardware to mimic the architecture of the PS2, granting a new lease on life to games that might otherwise be lost to time. For a title like The Forgotten Sands, which received mixed reviews compared to the critical acclaim of the original trilogy, preservation ensures that it remains accessible for critical re-evaluation. Players can now experience the PS2-exclusive elemental mechanics, such as the ability to control water and fire, with enhanced resolutions and save states, providing a quality-of-life experience that the original hardware could not offer.
However, the existence of "highly compressed" files raises questions regarding the ethics and legality of game preservation. While downloading ISOs of games one does not own constitutes copyright infringement, the archiving of these files by dedicated communities acts as a safeguard against the erosion of gaming history. As official digital storefronts close and physical media degrades, the "abandonware" status of older titles becomes a gray area. For Prince of Persia, a franchise currently in a state of hibernation, the availability of its games ensures that the fanbase remains active and hopeful for a revival.
In conclusion, the search for Prince of Persia: The Forgotten Sands PS2 ISO highly compressed is about more than just obtaining a free game; it is a testament to the enduring legacy of the PlayStation 2 era. It reflects the technical challenges of digital storage and the community's dedication to ensuring that even the less-celebrated chapters of a beloved franchise are not forgotten. Through the efforts of preservationists and the technology of emulation, the Prince’s journey through the sands continues to run on modern screens, proving that great gameplay transcends the limitations of aging hardware.
Hey there! If you're looking for a PS2 ISO of Prince of Persia: The Forgotten Sands , there’s a bit of a catch you should know about. The Short Answer Pros and Cons Pros:
There is no official PlayStation 2 version of The Forgotten Sands.
The game was released in 2010, long after the PS2's peak. Because it doesn't officially exist for that console, you won't find a legitimate PS2 ISO for it. Why you might see "PS2 ISO" links online
If you find a site offering a "highly compressed PS2 ISO" for this specific title, it is likely one of two things:
A Fake or Virus: Many "highly compressed" files are clickbait designed to get you to download malware.
Reprint Confusion: In 2010, Ubisoft released a reprinted version of the original Sands of Time for PS2 with new cover art that looked very similar to The Forgotten Sands to promote the movie. Some people mistake this for a new game. Where you can actually play it
If you really want to play The Forgotten Sands, you have several official options: The "Main" Version: Available on PC, PS3, and Xbox 360.
The "Alternative" Versions: These are actually entirely different games (different stories and gameplay) built specifically for their hardware: Wii: Focused on motion controls and a unique story. PSP: A 2.5D side-scrolling style adventure. Nintendo DS: A unique touch-screen based adventure. Recommendations for PS2 Owners
If you're looking for the best Prince of Persia experience on an actual PS2, I'd highly recommend the original Sands of Time Trilogy, which is widely considered a masterpiece of that era: Prince of Persia: The Sands of Time Prince of Persia: Warrior Within Prince of Persia: The Two Thrones
Are you trying to play this on a physical PS2 console, or are you using an emulator like PCSX2? If you're on an emulator, you might have better luck looking for the PSP version (playable on the PPSSPP emulator).
The Timeless Classic: Prince of Persia - The Forgotten Sands PS2 ISO Highly Compressed
The Prince of Persia series has been a staple of the gaming world for decades, with its unique blend of platforming, puzzle-solving, and epic storytelling. One of the most beloved games in the series is Prince of Persia - The Forgotten Sands, a title that was released in 2010 for various platforms, including the PlayStation 2. For those who are looking to relive the magic of this game, we've got some great news: you can now download a highly compressed PS2 ISO of Prince of Persia - The Forgotten Sands.
A Brief History of the Game
Prince of Persia - The Forgotten Sands is a action-adventure game developed by Ubisoft Montreal and published by Ubisoft. The game is a prequel to the original Prince of Persia: The Sands of Time, and follows the story of Dastan, a young prince who must navigate the treacherous world of ancient Persia. With the help of his trusty dagger and a magical amulet, Dastan must battle against the evil Nizam and his dark sorcery.
The game features a unique blend of platforming, combat, and puzzle-solving, with a rich narrative that explores themes of friendship, loyalty, and the consequences of playing with forces beyond one's control. The game's art style, soundtrack, and voice acting all received critical acclaim, making it a must-play for fans of the series.
The PS2 Version
The PS2 version of Prince of Persia - The Forgotten Sands was one of the most popular releases of the game, and it's easy to see why. The game's controls were perfectly suited to the PS2's DualShock controller, and the graphics were some of the best on the console at the time. The game's soundtrack, composed by Joel Bogen and Harry Gregson-Williams, was also widely praised for its epic scope and memorable themes.
Downloading the Highly Compressed PS2 ISO
So, how can you get your hands on a highly compressed PS2 ISO of Prince of Persia - The Forgotten Sands? There are several websites and torrent trackers that offer the game for download, but be careful: not all of these sources are created equal. Some may offer corrupted or incomplete files, while others may bundle the game with malware or other unwanted software.
To avoid these risks, it's essential to do your research and find a reputable source for the game. Look for websites with good reputations and a history of offering high-quality game downloads. You can also check online forums and communities, such as Reddit's r/GameDeals or r/PS2, to see if other users have successfully downloaded the game.
Benefits of a Highly Compressed PS2 ISO
So, why would you want to download a highly compressed PS2 ISO of Prince of Persia - The Forgotten Sands? There are several benefits:
How to Play the Game
Once you've downloaded the highly compressed PS2 ISO of Prince of Persia - The Forgotten Sands, you'll need to use an emulator to play the game. Here's a brief guide to get you started:
Conclusion
Prince of Persia - The Forgotten Sands is a timeless classic that still holds up today, and with a highly compressed PS2 ISO, you can easily play the game on a variety of devices. Whether you're a longtime fan of the series or just looking for a great action-adventure game to play, this title is definitely worth checking out. Just be sure to do your research and find a reputable source for the game, and follow the instructions for playing the game on your device.
FAQs
Before diving into a review, it is important to clarify a critical fact: Prince of Persia: The Forgotten Sands was never officially released for the PlayStation 2.
While it launched in 2010 for platforms like the PS3, Xbox 360, Wii, and PSP, the PS2 era had already ended for the franchise. If you find a "PS2 ISO" for this title, it is likely one of three things:
A "fake" or fan-made mod: Usually a modded version of The Sands of Time or The Two Thrones with updated textures or menu screens to mimic the newer game.
The PSP version: A "highly compressed" file that is actually the PSP ISO, intended to be played on an emulator like PPSSPP.
Malware: "Highly compressed" files (e.g., 10MB for a multi-GB game) are frequently used to hide malicious software.
Below is a review based on the official 2010 release (specifically the console/handheld versions it was actually on), which provides context on what this game is. The Forgotten Sands: A "Sands of Time" Bridge
The game is set in the seven-year gap between The Sands of Time and Warrior Within. It attempted to return to the series' roots after the experimental 2008 reboot. Core Gameplay & Mechanics
Elemental Platforming: The standout feature is the ability to manipulate nature. You can freeze water to turn fountains and waterfalls into solid poles or walls for climbing.
Combat Overhaul: Unlike the technical duels of earlier games, this version focuses on large-scale crowd control. You often fight dozens of sand skeletons simultaneously using elemental powers like "Whirlwind" or "Fire Trail". Users with limited bandwidth (mobile hotspots
Classic Rewind: The signature time-rewind mechanic returns, allowing you to undo platforming mistakes. The Mixed Experience
Prince of Persia: The Forgotten Sands is a standout entry in Ubisoft's legendary franchise, serving as a narrative bridge between The Sands of Time and Warrior Within. While the "Forgotten Sands" title was released across multiple platforms in 2010, many fans often seek a PS2 ISO version to complete their legacy collection on the iconic Sony PlayStation 2 console. Does Prince of Persia: The Forgotten Sands Exist on PS2?
Technically, Prince of Persia: The Forgotten Sands was never officially released for the PlayStation 2. By its 2010 launch, Ubisoft had shifted focus to the PlayStation 3, Xbox 360, and Wii.
However, the search for a "PS2 ISO" usually refers to one of three things:
The Wii Version Ported/Modded: Some community enthusiasts attempt to port or "highly compress" versions from other platforms like the Wii, which featured a completely different story and gameplay style tailored for older hardware.
The PSP Version: The PlayStation Portable (PSP) received a unique 2.5D side-scrolling version.
Official Trilogy Reprints: Because of the title's confusing release timing, some physical PS2 copies of the original Sands of Time were reprinted with updated cover art that resembled The Forgotten Sands to tie in with the 2010 movie. Key Features of The Forgotten Sands Era
If you are playing a version of this title via emulation or on its original hardware, here is what makes this "interquel" unique:
The pursuit of a "highly compressed PS2 ISO" for Prince of Persia: The Forgotten Sands
is a journey into a gaming myth, as Ubisoft never officially released this title for the PlayStation 2. While the game is a nostalgic bridge to the "Sands of Time" era, the version you are looking for likely stems from misconceptions regarding its multi-platform release. The Missing PS2 Link
Prince of Persia: The Forgotten Sands launched in 2010 for the PlayStation 3, Xbox 360, Wii, PSP, DS, and PC. Despite the original trilogy being staples of the PS2 library, Ubisoft chose to skip the console for this interquel, which takes place in the seven-year gap between The Sands of Time and Warrior Within.
When users search for a "PS2 ISO," they are often actually finding:
The PSP Version: This is a common point of confusion. Because the PSP and PS2 share similar hardware architectures, many "highly compressed" files circulating online are actually PSP ISOs intended for emulators like PPSSPP.
The Wii Version: Developed separately by Ubisoft Quebec, this version features a unique story and motion-controlled gameplay but was never ported to the PS2. Why the Confusion Exists
The game was marketed as a "return to the PS2 roots". This tagline was intended to signal a shift away from the artistic experimentation of the 2008 reboot and back to the platforming and time-manipulation mechanics that made the PS2 trilogy famous. This thematic return often leads modern players to believe a physical PS2 version exists. Authentic Ways to Experience the Game
Since a native PS2 ISO does not exist, you can play the game through several official channels:
Legacy Hardware: The PlayStation Portable version offers a unique story distinct from the console release.
Modern Systems: The "primary" version is available on PC via Steam and is backward compatible on Xbox Series X|S and Xbox One.
The Trilogy Alternative: If you are strictly looking for PS2-native titles, the original Prince of Persia Trilogy—including The Sands of Time, Warrior Within, and The Two Thrones—remains the definitive experience for that console.
The Quest for the Forgotten Sands
In the scorching deserts of Persia, a legendary prince roamed, seeking a way to alter the course of his destiny. The game, Prince of Persia: The Forgotten Sands, was a classic tale of adventure, magic, and sibling rivalry. For those who had played it on the PlayStation 2, the memories of navigating the treacherous sand dunes, fighting off ferocious creatures, and solving intricate puzzles were still fresh.
But for those who didn't have access to the game or wanted to relive the experience, a solution emerged in the form of a highly compressed PS2 ISO file. The file, labeled "prince of persia the forgotten sands ps2 iso highly compressed," promised to deliver the same thrilling experience as the original game, but with a significantly reduced file size.
Rohan, a young gamer, had been searching for this file for months. He had heard about the game's captivating storyline, which explored the complex relationships between the prince, his brother, and the evil wizard, Nizam. The game's unique blend of platforming, combat, and exploration had garnered critical acclaim, and Rohan was determined to experience it for himself.
One evening, Rohan stumbled upon a website offering the highly compressed ISO file for download. The website claimed that the file was optimized for smooth gameplay, with reduced loading times and minimal lag. Rohan's excitement grew as he clicked the download button, and the file began to transfer to his computer.
As the download completed, Rohan extracted the file and launched the game using a PS2 emulator. The game sprang to life, transporting him to the mystical world of Persia. He was immediately immersed in the prince's quest, navigating treacherous desert landscapes, avoiding deadly traps, and battling fearsome enemies.
The game's protagonist, the prince, was a complex character with a rich backstory. His relationships with his brother, Malik, and the beautiful princess, Tamina, added depth to the narrative. Rohan found himself invested in the prince's journey, eager to uncover the secrets of the Forgotten Sands and help him achieve his goals.
As Rohan played through the game, he encountered various challenges, from intense boss battles to brain-teasing puzzles. The game's controls, although slightly dated, still felt responsive and intuitive. The beautiful, hand-drawn graphics and haunting soundtrack further enhanced the gaming experience.
Rohan spent hours exploring the world of Persia, uncovering hidden secrets and marveling at the game's design. He encountered a cast of memorable characters, each with their own motivations and conflicts. The game's story was full of twists and turns, keeping Rohan engaged and curious.
As the night wore on, Rohan finally completed the game, feeling a sense of satisfaction and accomplishment. He had experienced the magic of Prince of Persia: The Forgotten Sands, and it had left a lasting impression on him. The highly compressed PS2 ISO file had delivered a seamless gaming experience, proving that sometimes, the most unlikely solutions can lead to the greatest adventures.
End of Story
Official Availability: The game does not exist on the PS2 console. Any "PS2 ISO" you find online is either a fake file, a different game in the series renamed to deceive users, or a port of the PSP version (which is a different game entirely).
Common Scams: "Highly compressed" files claiming to be this game for PS2 are often used as vehicles for malware or surveys. Legitimate PS2 Prince of Persia titles include The Sands of Time, Warrior Within, and The Two Thrones.
PSP vs. PS2: A unique version of The Forgotten Sands was released for the PSP. Some users attempt to play this version on other devices using emulators like PPSSPP.
Safe Alternatives: You can find the authentic version of the game on Epic Games or Steam for PC.
If you are concerned about online safety while searching for software, organizations like the WeProtect Global Alliance provide resources on digital safety and protection. If you'd like, I can help you: Find the system requirements for the PC version Locate the legitimate PS2 games in the series
Provide a story summary to see if it's the game you're remembering Let me know how you'd like to proceed. Prince of Persia: The Forgotten Sands™ on Steam
A highly compressed file reduces that 4.7 GB down to between 600 MB and 1.2 GB using algorithms like CSO (Compressed ISO) or archiving tools like WinRAR or 7-Zip with ultra-settings. This is a lifesaver for:
The Mayans employed three calendars, all organised as hierarchies of cycles of days of various lengths. The Long Count was the principal calendar for historical purposes, the Haab was used as the civil calendar, while the Tzolkin was the religious calendar. All of the Mayan calendars are based on serial counting of days without means for synchronising the calendar to the Sun or Moon, although the Long Count and Haab calendars contain cycles of 360 and 365 days, respectively, which are roughly comparable to the solar year. Based purely on counting days, the Long Count more closely resembles the Julian Day system and contemporary computer representations of date and time than other calendars devised in antiquity. Also distinctly modern in appearance is that days and cycles count from zero, not one as in most other calendars, which simplifies the computation of dates, and that numbers as opposed to names were used for all of the cycles.
| Cycle | Composed of | Total Days |
Years (approx.) |
|---|---|---|---|
| kin | 1 | ||
| uinal | 20 kin | 20 | |
| tun | 18 uinal | 360 | 0.986 |
| katun | 20 tun | 7200 | 19.7 |
| baktun | 20 katun | 144,000 | 394.3 |
| pictun | 20 baktun | 2,880,000 | 7,885 |
| calabtun | 20 piktun | 57,600,000 | 157,704 |
| kinchiltun | 20 calabtun | 1,152,000,000 | 3,154,071 |
| alautun | 20 kinchiltun | 23,040,000,000 | 63,081,429 |
The Long Count calendar is organised into the hierarchy of cycles shown at the right. Each of the cycles is composed of 20 of the next shorter cycle with the exception of the tun, which consists of 18 uinal of 20 days each. This results in a tun of 360 days, which maintains approximate alignment with the solar year over modest intervals—the calendar comes undone from the Sun 5 days every tun.
The Mayans believed at at the conclusion of each pictun cycle of about 7,885 years the universe is destroyed and re-created. Those with apocalyptic inclinations will be relieved to observe that the present cycle will not end until Columbus Day, October 12, 4772 in the Gregorian calendar. Speaking of apocalyptic events, it's amusing to observe that the longest of the cycles in the Mayan calendar, alautun, about 63 million years, is comparable to the 65 million years since the impact which brought down the curtain on the dinosaurs—an impact which occurred near the Yucatan peninsula where, almost an alautun later, the Mayan civilisation flourished. If the universe is going to be destroyed and the end of the current pictun, there's no point in writing dates using the longer cycles, so we dispense with them here.
Dates in the Long Count calendar are written, by convention, as:
baktun . katun . tun . uinal . kin
and thus resemble present-day Internet IP addresses!
For civil purposes the Mayans used the Haab calendar in which the year was divided into 18 named periods of 20 days each, followed by five Uayeb days not considered part of any period. Dates in this calendar are written as a day number (0 to 19 for regular periods and 0 to 4 for the days of Uayeb) followed by the name of the period. This calendar has no concept of year numbers; it simply repeats at the end of the complete 365 day cycle. Consequently, it is not possible, given a date in the Haab calendar, to determine the Long Count or year in other calendars. The 365 day cycle provides better alignment with the solar year than the 360 day tun of the Long Count but, lacking a leap year mechanism, the Haab calendar shifted one day with respect to the seasons about every four years.
The Mayan religion employed the Tzolkin calendar, composed of 20 named periods of 13 days. Unlike the Haab calendar, in which the day numbers increment until the end of the period, at which time the next period name is used and the day count reset to 0, the names and numbers in the Tzolkin calendar advance in parallel. On each successive day, the day number is incremented by 1, being reset to 0 upon reaching 13, and the next in the cycle of twenty names is affixed to it. Since 13 does not evenly divide 20, there are thus a total of 260 day number and period names before the calendar repeats. As with the Haab calendar, cycles are not counted and one cannot, therefore, convert a Tzolkin date into a unique date in other calendars. The 260 day cycle formed the basis for Mayan religious events and has no relation to the solar year or lunar month.
The Mayans frequently specified dates using both the Haab
and Tzolkin calendars; dates of this form repeat only
every 52 solar years.
A bewildering variety of calendars have been and continue to be used in the Indian subcontinent. In 1957 the Indian government's Calendar Reform Committee adopted the National Calendar of India for civil purposes and, in addition, defined guidelines to standardise computation of the religious calendar, which is based on astronomical observations. The civil calendar is used throughout India today for administrative purposes, but a variety of religious calendars remain in use. We present the civil calendar here.
The National Calendar of India is composed of 12 months. The first month, Caitra, is 30 days in normal and 31 days in leap years. This is followed by five consecutive 31 day months, then six 30 day months. Leap years in the Indian calendar occur in the same years as as in the Gregorian calendar; the two calendars thus have identical accuracy and remain synchronised.
Years in the Indian calendar are counted from the start of
the Saka Era, the equinox of March 22nd of year 79 in the
Gregorian calendar, designated day 1 of month
Caitra of year 1 in the Saka Era. The calendar was
officially adopted on 1 Caitra, 1879 Saka Era, or
March 22nd, 1957 Gregorian. Since year 1 of the Indian
calendar differs from year 1 of the Gregorian, to
determine whether a year in the Indian calendar is a leap
year, add 78 to the year of the Saka era then
apply the Gregorian calendar rule to the sum.
The French Republican calendar was adopted by a decree of La Convention Nationale on Gregorian date October 5, 1793 and went into effect the following November 24th, on which day Fabre d'glantine proposed to the Convention the names for the months. It incarnates the revolutionary spirit of “Out with the old! In with the relentlessly rational!” which later gave rise in 1795 to the metric system of weights and measures which has proven more durable than the Republican calendar.
The calendar consists of 12 months of 30 days each, followed by a five- or six-day holiday period, the jours complmentaires or sans-culottides. Months are grouped into four seasons; the three months of each season end with the same letters and rhyme with one another. The calendar begins on Gregorian date September 22nd, 1792, the September equinox and date of the founding of the First Republic. This day is designated the first day of the month of Vendmiaire in year 1 of the Republic. Subsequent years begin on the day in which the September equinox occurs as reckoned at the Paris meridian. Days begin at true solar midnight. Whether the sans-culottides period contains five or six days depends on the actual date of the equinox. Consequently, there is no leap year rule per se: 366 day years do not recur in a regular pattern but instead follow the dictates of astronomy. The calendar therefore stays perfectly aligned with the seasons. No attempt is made to synchronise months with the phases of the Moon.
The Republican calendar is rare in that it has no concept of a seven day week. Each thirty day month is divided into three dcades of ten days each, the last of which, dcadi, was the day of rest. (The word “dcade” may confuse English speakers; the French noun denoting ten years is “dcennie”.) The names of days in the dcade are derived from their number in the ten day sequence. The five or six days of the sans-culottides do not bear the names of the dcade. Instead, each of these holidays commemorates an aspect of the republican spirit. The last, jour de la Rvolution, occurs only in years of 366 days.
Napolon abolished the Republican calendar in favour of the Gregorian on January 1st, 1806. Thus France, one of the first countries to adopt the Gregorian calendar (in December 1582), became the only country to subsequently abandon and then re-adopt it. During the period of the Paris Commune uprising in 1871 the Republican calendar was again briefly used.
The original decree
which established the Republican calendar contained a
contradiction: it defined the year as starting on the day
of the true autumnal equinox in Paris, but further prescribed
a four year cycle called la Franciade, the fourth
year of which would end with le jour de la Rvolution
and hence contain 366 days. These two specifications are
incompatible, as 366 day years defined by the equinox do
not recur on a regular four year schedule. This problem was
recognised shortly after the calendar was proclaimed, but the
calendar was abandoned five years before the first conflict
would have occurred and the issue was never formally resolved. Here
we assume the equinox rule prevails, as a rigid four year
cycle would be no more accurate than the Julian calendar, which
couldn't possibly be the intent of its enlightened Republican
designers.
The
International Standards Organisation
(ISO) issued
Standard ISO 8601, “Representation of Dates” in 1988,
superseding the earlier ISO 2015. The bulk of the standard
consists of standards for representing dates in the
Gregorian calendar including the highly recommended
“YYYY-MM-DD” form which is unambiguous, free of cultural
bias, can be sorted into order without rearrangement, and is
Y9K compliant. In addition, ISO 8601 formally defines the
“calendar week” often encountered in commercial transactions
in Europe. The first calendar week of a year: week 1, is
that week which contains the first Thursday of the year (or,
equivalently, the week which includes January 4th of the
year; the first day of that week is the previous Monday).
The last week: week 52 or 53 depending on the
date of Monday in the first week, is that which contains
December 28th of the year. The first ISO calendar week of a
given year starts with a Monday which can be as early as
December 29th of the previous year or as late as January
4th of the present; the last calendar week can end as late
as Sunday, January 3rd of the subsequent year.
ISO 8601 dates in year, week, and day form are written
with a “W” preceding the week number, which bears a leading
zero if less than 10, for example February 29th, 2000
is written as 2000-02-29 in year, month, day format and
2000-W09-2 in year, week, day form; since the day number
can never exceed 7, only a single digit is required.
The hyphens may be elided for brevity and the day number
omitted if not required. You will frequently see date of
manufacture codes such as “00W09” stamped on products; this
is an abbreviation of 2000-W09, the ninth week of year 2000.
In solar calendars such as the Gregorian, only days and years have physical significance: days are defined by the rotation of the Earth, and years by its orbit about the Sun. Months, decoupled from the phases of the Moon, are but a memory of forgotten lunar calendars, while weeks of seven days are entirely a social construct—while most calendars in use today adopt a cycle of seven day names or numbers, calendars with name cycles ranging from four to sixty days have been used by other cultures in history.
ISO 8601 permits us to jettison the historical and cultural baggage of weeks and months and express a date simply by the year and day number within that year, ranging from 001 for January 1st through 365 (366 in a leap year) for December 31st. This format makes it easy to do arithmetic with dates within a year, and only slightly more complicated for periods which span year boundaries. You'll see this representation used in project planning and for specifying delivery dates. ISO dates in this form are written as “YYYY-DDD”, for example 2000-060 for February 29th, 2000; leading zeroes are always written in the day number, but the hyphen may be omitted for brevity.
All ISO 8601 date formats have the advantages of being
fixed length (at least until the Y10K crisis rolls around) and, when
stored in a computer, of being sorted in date order
by an alphanumeric sort of their textual representations.
The ISO week and day and day of year calendars are
derivative of the Gregorian calendar and share its accuracy.
Development of the Unix operating system began at Bell Laboratories in 1969 by Dennis Ritchie and Ken Thompson, with the first PDP-11 version becoming operational in February 1971. Unix wisely adopted the convention that all internal dates and times (for example, the time of creation and last modification of files) were kept in Universal Time, and converted to local time based on a per-user time zone specification. This far-sighted choice has made it vastly easier to integrate Unix systems into far-flung networks without a chaos of conflicting time settings.
Many machines on which Unix was initially widely deployed could not support arithmetic on integers longer than 32 bits without costly multiple-precision computation in software. The internal representation of time was therefore chosen to be the number of seconds elapsed since 00:00 Universal time on January 1, 1970 in the Gregorian calendar (Julian day 2440587.5), with time stored as a 32 bit signed integer (long in early C implementations).
The influence of Unix time representation has spread well beyond Unix since most C and C++ libraries on other systems provide Unix-compatible time and date functions. The major drawback of Unix time representation is that, if kept as a 32 bit signed quantity, on January 19, 2038 it will go negative, resulting in chaos in programs unprepared for this. Unix and C implementations wisely (for reasons described below) define the result of the time() function as type time_t, which leaves the door open for remediation (by changing the definition to a 64 bit integer, for example) before the clock ticks the dreaded doomsday second.
C compilers on Unix systems prior to 7th Edition lacked the
32-bit long type. On earlier systems time_t,
the value returned by the time() function, was an array
of two 16-bit ints which, concatenated, represented the
32-bit value. This is the reason why time() accepts a
pointer argument to the result (prior to 7th Edition it returned
a status, not the 32-bit time) and ctime() requires a
pointer to its input argument. Thanks to Eric Allman (author
of sendmail) for
pointing out these historical nuggets.
Spreadsheet calculations frequently need to do arithmetic with date and time quantities—for example, calculating the interest on a loan with a given term. When Microsoft Excel was introduced for the PC Windows platform, it defined dates and times as “serial values”, which express dates and times as the number of days elapsed since midnight on January 1, 1900 with time given as a fraction of a day. Midnight on January 1, 1900 is day 1.0 in this scheme. Time zone is unspecified in Excel dates, with the NOW() function returning whatever the computer's clock is set to—in most cases local time, so when combining data from machines in different time zones you usually need to add or subtract the bias, which can differ over the year due to observance of summer time. Here we assume Excel dates represent Universal (Greenwich Mean) time, since there isn't any other rational choice. But don't assume you can always get away with this.
You'd be entitled to think, therefore, that conversion back and forth between PC Excel serial values and Julian day numbers would simply be a matter of adding or subtracting the Julian day number of December 31, 1899 (since the PC Excel days are numbered from 1). But this is a Microsoft calendar, remember, so one must first look to make sure it doesn't contain one of those bonehead blunders characteristic of Microsoft. As is usually the case, one doesn't have to look very far. If you have a copy of PC Excel, fire it up, format a cell as containing a date, and type 60 into it: out pops “February 29, 1900”. News apparently travels very slowly from Rome to Redmond—ever since Pope Gregory revised the calendar in 1582, years divisible by 100 have not been leap years, and consequently the year 1900 contained no February 29th. Due to this morsel of information having been lost somewhere between the Holy See and the Infernal Seattle monopoly, all Excel day numbers for days subsequent to February 28th, 1900 are one day greater than the actual day count from January 1, 1900. Further, note that any computation of the number of days in a period which begins in January or February 1900 and ends in a subsequent month will be off by one—the day count will be one greater than the actual number of days elapsed.
By the time the 1900 blunder was discovered, Excel users had created millions of spreadsheets containing incorrect day numbers, so Microsoft decided to leave the error in place rather than force users to convert their spreadsheets, and the error remains to this day. Note, however, that only 1900 is affected; while the first release of Excel probably also screwed up all years divisible by 100 and hence implemented a purely Julian calendar, contemporary versions do correctly count days in 2000 (which is a leap year, being divisible by 400), 2100, and subsequent end of century years.
PC Excel day numbers are valid only between 1 (January 1, 1900) and
2958465 (December 31, 9999). Although a serial day counting scheme
has no difficulty coping with arbitrary date ranges or days before
the start of the epoch (given sufficient precision in the representation
of numbers), Excel doesn't do so. Day 0 is deemed the idiotic
January 0, 1900 (at least in Excel 97), and negative days and
those in Y10K and beyond are not handled at all. Further, old
versions of Excel did date arithmetic using 16 bit quantities
and did not support day numbers greater than 65380 (December
31, 2078); I do not know in which release of Excel this
limitation was remedied.
Having saddled every PC Excel user with a defective date numbering scheme wasn't enough for Microsoft—nothing ever is. Next, they proceeded to come out with a Macintosh version of Excel which uses an entirely different day numbering system based on the MacOS native time format which counts days elapsed since January 1, 1904. To further obfuscate matters, on the Macintosh they chose to number days from zero rather than 1, so midnight on January 1, 1904 has serial value 0.0. By starting in 1904, they avoided screwing up 1900 as they did on the PC. So now Excel users who interchange data have to cope with two incompatible schemes for counting days, one of which thinks 1900 was a leap year and the other which doesn't go back that far. To compound the fun, you can now select either date system on either platform, so you can't be certain dates are compatible even when receiving data from another user with same kind of machine you're using. I'm sure this was all done in the interest of the “efficiency” of which Microsoft is so fond. As we all know, it would take a computer almost forever to add or subtract four in order to make everything seamlessly interchangeable.
Macintosh Excel day numbers are valid only between 0
(January 1, 1904) and 2957003 (December 31, 9999). Although
a serial day counting scheme has no difficulty coping with
arbitrary date ranges or days before the start of the epoch
(given sufficient precision in the representation of
numbers), Excel doesn't do so. Negative days and those in
Y10K and beyond are not handled at all. Further, old
versions of Excel did date arithmetic using 16 bit
quantities and did not support day numbers greater than
63918 (December 31, 2078); I do not know in which release of
Excel this limitation was remedied.
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