Today, we use the Gregorian calendar previously most of the Western world used regional variations of the Julian calendar. ![]() The world uses a different dating system today than we used several hundred years ago. However, you do need to keep the potential problems of early dates in mind. Luckily, Excel gives you the power to get around most common problems with early dates. ![]() Specifically, you want to sort them, and perform date arithmetic. Because when you work with dates prior to 1900 you generally will want to do the same two things you do with recent dates. This result is unfortunate, to say the least. On the other hand, this formula for one day earlier… …returns the value of 1, which indicates date serial number 1. To illustrate the 1900 date system, this formula… To change the default date, choose Tools, Options, select the Calculation tab, and then select or clear the 1904 date system checkbox.) (The default date for the Macintosh is 1904. Unfortunately, Excel’s serial number begins on Januand negative serial numbers aren’t recognized. ![]() ![]() However, there are several ways around this problem.Įxcel stores recent dates as a date serial number, which allows us to sort those dates and perform date arithmetic. If you work with dates prior to the year 1900, Excel’s standard date-handling system will be no help.
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