I am currently running Excel 2000 on Windows NT 4.0.

I have a spreadsheet which contains dates in the custom format "dd/mm/yyyy".

Up until this morning the dates displayed fine, however, the dates are now
showing in general format, i.e. "21/01/2006" is showing as "38738".
If I select the cell the date is shown correctly in the formula bar, and
also if I press F2 it is shown correctly for editing. But as soon as I move
off the cell it goes back to showing in general format.

I have tried changing the cell formatting but nothing seems to work, can
anyone please help.

Thanks
David