Assume that if any value is entered in A1 cell then if you want to display
the today’s date in some other cell then use this formula.
=IF(A1<>"",TODAY(),"")
Instead of displaying today’s date if you want to display a specific date
then use the formula like this…
=IF(A1<>"","11-11-2009","")
The above will result text value. For getting the date values use the below
=IF(A1<>"",VALUE("11-11-2009"),"")
Or
=IF(A1<>"",--"11-11-2009","")
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