A3 and A4 contain from and to dates.

B1 and B2 contain Year one start & Finish (eg 1/1/05 and 31/12/05)
Subsequent Colums contain subsequent years.

I need help in trying to establish how many days within the dates specified
in A3 and A4 are also contained within the periods specified in each column.

I am using Microsoft Office XP.
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Ron.