If A1 cell value is 55 then this formula will get you the Today's date.
=IF(A1=55,TODAY(),"")

If A1 cell value is NUMBER, then the below formula will get you the Today's
date.
=IF(ISNUMBER(A1),TODAY(),"")

Change the A1 cell to your desired cell.

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(Ms-Exl-Learner)
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"fs" wrote in message
...
I'm creating a checklist in Excel 2007 and would like to know how to
add a date in an adjacent cell automatically whenever I enter a
specific # into another cell. Does any one know of a simple formula?
Would apreciate it very much.
FS.