This is a variable number. You need to state a start and/or end date or time.
About 78 weeks between June 2009 and December 2010.
As today is January 27, 2010 there are 21 weeks until 23 June, 2010.
As today is January 11, 200 there are 24 weeks until June 28, 2010.
74 weeks between June 1 2009 until November 1 2010.
A little over 30 weeks between November 1st 2010 to June 1st 2011.
21 weeks and 4 days. In 2010 the 1st of January is a Friday and the 1st of June is a Tuesday.
25 weeks and 6 days.
44 weeks and 5 days!
28 weeks and 5 days.
23 weeks and 3 days.
43 weeks
52 weeks.