41 weeks (rounded down)
how many weeks are between January 2009 and august 15 2009
Between August 14 2009 and December 8, 2009 there were 16 weeks and 4 days.
15 weeks and 3 days.
74 weeks between June 1 2009 until November 1 2010.
8
105 weeks
73 weeks (rounded down)
130 weeks and 2 days.
80 weeks and 5 days.
25 weeks and 4 days.
90 weeks and 1 day.
2