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The difference between the two date systems is 1,462 days; that is, the serial value of a date in the 1900 date system is always 1,462 days greater than the serial value of the same date in the 1904 date system.Conversely, the serial value of a date in the 1904 date system is always 1,462 days less than the serial value of the same date in the 1900 date system.
Important: To ensure that year values are interpreted as you intended, type year values as four digits (for example, 2001, not 01).I’ve deleted the rest of the material in case it was distracting the downvoters.I have no idea what the downvoters are disagreeing with, since they did not condescend to say why. You often ask questions such as: when was a product purchased, how long will a task in a project take, or what is the average revenue for a fiscal quarter?Entering dates correctly is essential to ensuring accurate results.The default date system for Excel for Windows is 1900; and the default date system for Excel for Mac is 1904.
Originally, Excel for Windows was based on the 1900 date system, because it enabled better compatibility with other spreadsheet programs that were designed to run under MS-DOS and Microsoft Windows, and therefore it became the default date system.
The decimal number is a value ranging from 0 (zero) to 0.99999999, representing the times from ( A. You can view a date as a serial value and a time as a decimal fraction by changing the format of the cell that contains the date or time to General format.
Both Excel for Mac and Excel for Windows support the 19 date systems.
For example, if you are working in Excel and you open a document that was created in Excel for Mac, the 1904 date system check box is selected automatically.
You can change the date system by doing the following: You can encounter problems when you copy and paste dates or when you create external references between workbooks based on the two different date systems.
Originally, Excel for Mac was based on the 1904 date system, because it enabled better compatibility with early Macintosh computers that did not support dates before January 2, 1904, and therefore it became the default date system.