I am having a problem where when copying rows that contains a date field into
another workbook, the date actually changes (usually by minus 4 years and 1
day eg 04/10/2008 becomes 03/10/2004). The first workbook is an export from
another program which we receive by email and is a csv file when received.
It then has a VBA macro run over it that deletes unwanted columns, rearranges
columns and formats some columns to text (not the date field) before pasting
into another workbook.

The problem is intermittent but seems to be dependent on what order the
workbooks are opened in. Otherwise can only be solved by either closing
Excel and starting again and sometimes only by restarting the computer. Can
anyone help!