Published at LXer:
Microsoft has used two different starting points on the calendar for calculating dates in different versions of their Excel spreadsheet program. Really. One version used 1 January 1900 for serial day numbering, the other used 1 January 1904.Of course, up to date versions of Microsoft Excel can handle this difference in older files easily, just like up to date versions of Microsoft Windows are completely problem-free and totally, absolutely secure.
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