One possible reason is that you used two different date system:
menu: ToolsOptionCalculation Tab. 1904 date system.
(Not quite sure this is the case for your problem)

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Excel supports two date systems: the 1900 and 1904 date systems. The default
date system for Microsoft Excel for Windows is 1900. The default date system
for Microsoft Excel for the Macintosh is 1904. You can change the date
system. On the Tools menu, click Options, click the Calculation tab, and
then select or clear the 1904 date system check box.

The date system is changed automatically when you open a document from
another platform. For example, if you are working in Excel for Windows and
you open a document created in Excel for the Macintosh, the 1904 date system
check box is selected automatically.


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Best regards,
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Yongjun CHEN
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"360Kid" wrote in message
...
I cannot copy past a formatted date cell from one sheet to another - excel
automatically adjust the date by 2 days and 2 years. Any info?