I copied a group of dates from one workbook to another. When I did this, the dates advanced four years and one day. What had been 1-2-2005 in the old workbook was now 1-3-2009. When I imported the worksheet containing these dates into MS-Access the dates changed to 4 years and 1 day earlier from 1-2-05 to 1-1-01. I'm currently using ms-office 2004 on the mac os 10.4 and also crossing platforms with virtual pc to ms-office xp in windows xp. Does anybody have any ideas about what is going on?