Calculate the difference between two times on spreedsheet.com
Spreadsheet.com datetime cells are no different from excel datetimes. They are underneath numbers the way excel computes it. So, computing a difference between two date/date-time cells is simply creating a formula to compute difference between two cells and formatting it as say a duration to display the time difference.
Something I have put together as an example:
If this does not help you, let us know your use-case here.
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