Written by Allen Wyatt (last updated November 6, 2021)
This tip applies to Excel 2007, 2010, 2013, 2016, 2019, and Excel in Microsoft 365
Excel allows you to choose which arbitrary date you use as the beginning point for date and time serial numbers. In the PC world, the default date is January 1, 1900. If you are working with Excel workbooks imported from the Macintosh environment, however, you will want to set the starting date to January 2, 1904—the default date used on the Mac.
To set which of these two dates is used, follow these steps:
Figure 1. The Advanced options of the Excel Options dialog box.
ExcelTips is your source for cost-effective Microsoft Excel training. This tip (6249) applies to Microsoft Excel 2007, 2010, 2013, 2016, 2019, and Excel in Microsoft 365. You can find a version of this tip for the older menu interface of Excel here: Changing Excel's Starting Date.
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2021-11-06 11:48:15
J. Woolley
This can also be changed using Workbook property Date1904. For example:
ActiveWorkbook.Date1904 = False -- use PC default
ActiveWorkbook.Date1904 = True -- use Macintosh default
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