Not sure I quite follow your logic but using the functions DAY(A1)
MONTH(A1) YEAR(A1) you can split a date into it's component parts.
Then use DATE(year,, month, day) to get the new date.

therefore if cell A1 contains 31/Jan/2006 then
=date(year(A1)+11,Month(A1),20) returns 20Jan/2011

regards


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tony h
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