There are four weeks in December.
There are 4 weeks and 3 days in December.
There are 4 weeks and 2 days in December 2010.
521 weeks and 5 days.
3600 weeks and 2 days.
313 weeks.
260 weeks and 6 days.
4
52 weeks rounded up.
About 78 weeks between June 2009 and December 2010.
23 from July 1st to December 1st
From the 30th of April to the 1st of December is 30 weeks and 5 days.
Weeks from August 30 to December 31 2010 is slightly over 17.