Calculate the first day of the calendar week

Question

I need to calculate the date of the first day in a calendar week, for example.

Week 1 in 2009 → Mon, 12/29/2008 (!)
Week 44 in 2009 → Mon, 10.26.2009

I have ugly code for this, but I would prefer good C ++ lib.

Any suggestions?

Answer 1

how about boost :: gregorian :: date with its algorithms ?