Including the start and end dates in the calculation, there are 39 weeks 4 days between the two dates.
47 weeks since April 27 2009 until March 22 2010.
74 weeks between June 1 2009 until November 1 2010.
105 weeks
March 2009 to April 2009 has a total of eight weeks, four weeks in each month.
Adding 10 weeks to March 26, 2009 gives June 4, 2009.
80 weeks and 5 days.
90 weeks and 1 day.
73 weeks (rounded down)
25 weeks and 4 days.
41 weeks (rounded down)
130 weeks and 2 days.
There are 63 weeks and 1 day between the two dates.