Hi All
Can anyone help me with a formula to calculate the Week Commencing date based on a date supplied?
I found this:
http://www.bygsoftware.com/Excel/fun.../iso_dates.htm
and tried:
=1+INT((A1-DATE(YEAR(A1+4-WEEKDAY(A1,2)),1,5)+WEEKDAY(DATE(YEAR(A1+4-WEEKDAY(A1,2)),1,4),2))/7)
Using a date in A1 of "28-Sept-05" (formatted) but this returns a completely wrong date "08/02/1900"
Am I doing something wrong?
Excel Version 2000
Any help appreciated. Thanks
Jules
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