Trying to use an Excel Date and Time function, but Excel returns a serial number instead of date; this is because Excel stores dates and times in serial numbers in the backend; for instance, when ...

If you need to calculate dates in your spreadsheets, Excel uses its own unique system, which it calls Serial Numbers. Every date (month, day, year) and time (hour, minute, and second) has an ...

For example, "2012" entered into a date-formatted cell becomes July 5, 1909 in Excel for the Mac and July 4, 1905, under Windows. That's because the Excel for the Mac treats January 2, 1904, as ...