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How do I subtract days from a cell that has dates?

For example, what's a formula that will take 3/2/2011 and return this value 2/28/2011?

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up vote 4 down vote accepted

If you have one cell that is formatted as a date (e.g. 3/2/11) and subtract 2 from it, you will get 2/28/11: enter image description here

For example your formula would be

A1-2
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More generally, you can decompose a given date into YEAR(), MONTH(), and DAY() values, then recombine them via DATE(). For instance, to add six months and a day to A1

=DATE(YEAR(A1), MONTH(A1)+6, DAY(A1)+1 )
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