You probably derive each date from a previous one by adding 1.
No need to take care of the number of days in a month yourself; Excel will
do that and handle leap years correctly.
IOW if A1 is Feb 28 2006, adding 1 will result in March 1 2006, if A1 is Feb
28 2008, adding 1 will give Feb 29 2008.

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Kind Regards,

Niek Otten

Microsoft MVP - Excel

"paddymack" wrote in message
...
I am creating an appointment book and want to accomodate the extra day
every
leap year. If D3=2006 than D35=1 March but if D3=2008 it must be 29 Feb.
I
need two formulars in one cell to accmodate the variation in D3. Can
anybody
help?