I don't think so!

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HTH

Bob

"smartin" wrote in message
...
Herbert Seidenberg wrote:
Try
1/1/2008 20/11/2008
9/11/2008 11/11/2008

Ah, a misplaced paren:

=MAX(0,MIN(KeyDateEnd,$B1)+1-MAX(KeyDateStart,$A1))+1
^^^