Hi,
I am using Excel 2003 and am using this formula for converting dates
(21/07/2003)
to the following format 2003_w30. But for 2007 instead of giving me 2007_w01
I get 2006_w53, can some have a look at the formula and correct it?
=YEAR(M2)&TEXT(WEEKNUM(M2-1),"""_w""00")

Regards,
Noel LAckey.