I have been working on a large spreadsheet. my date formats have been fine
until today, when I opened the spreadsheet to update it and all the dates are
appearing as numbers. I have tried reformatting the cell, coping the format
from a cell that is working on another spreadsheet, deleting, inserting and
copying formats but nothing is working. What has happened? I am using excel
2000 on windows xp. Any suggestions gratefully received.