Thank you for sharing this, dates are kind of "fun" (or a pain). Now the script only lacks a parameter to set the first day in the week to Monday (= the case in Europe) and to add a column isoweek (isoweek 1= first week with at least 4 days in it I guess) - for example 1 January 2010 is in week 53 of the year 2009 ! so isoweek 200953 or something like that.

Guess that is work for somebody else ! 😉