Not understood because it was not stated as such.
Private Sub Workbook_BeforePrint(Cancel As Boolean)
ActiveSheet.PageSetup.LeftHeader = Format(Date, "dd mm yy")
End Sub
'This is workbook event code.
'To input this code, right click on the Excel icon on the worksheet
'(or next to the File menu if you maximise your workbooks),
'select View Code from the menu, and paste the code
--
HTH
Bob Phillips
(remove nothere from email address if mailing direct)