Cheers David, at least it wasn't me going mad.
I finally managed it by setting the date as dd/mmm/yyyy
SQL = "UPDATE [TABLE - WR & WBS Codes] SET [TABLE - WR & WBS Codes].[DateWRADatabaseUpdated] = #" & Format(Me.[WRA Database Updated], "dd/mmm/yyyy") & "# WHERE [TABLE - WR & WBS...