You could use a Worksheet_change or Workbook_beforesave macro to
populate a cell with the current date/time.

e.g.

Private Sub Workbook_BeforeSave(ByVal SaveAsUI As Boolean, Cancel As
Boolean)
Sheets(1).Cells(1, 1) = Date
End Sub

pasted into the thiswokbook tab in the VBA editor (Shift F11)


--
mrice

Research Scientist with many years of spreadsheet development experience
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