Including the dates given there are 281 days, or 40 weeks.
About 78 weeks between June 2009 and December 2010.
There are 99 weeks (23 mounths) between February 2009 and December 2010.
There are 48 weeks and 6 days between January 1 2010 and December 9 2010.
A little over 97 weeks between January 28 2009 and December 12 2010.
313 weeks.
A little over 43 weeks between March 4 2010 and January 5 2011.
28 weeks and 5 days.
24 weeks and 2 days.
56 weeks and 3 days
There are 4 weeks and 2 days in December 2010.
A little over 4 weeks February 8th to March 10 2010.
34 weeks and 6 days.