Adding and subtracting days. By the time we get all the way to the present decade the numbers have gotten pretty big. Then type a formula like one of the following.
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You can do this by creating a spreadsheet with 19000101 and xlsread will read that as as a numeric 1. If you change the cell format to General youll see the underlying date serial number. The time will be set to the default value which is 240000. Total minutes between two times 295 B2-A286400.