There are 26 week (and 5 days) between June to December 1 2006.
About 78 weeks between June 2009 and December 2010.
There are 28 weeks and 2 days between June 6, 2009 and December 21, 2009.
351 weeks and 2 days.
28 weeks and 5 days.
That's about 30 1/2 weeks.
26 weeks and 1 day.
25 weeks and 4 days.
From June 20, 2009 to December 18, 2009 was 26 weeks or 6 months.
There were 174 weeks between the two dates.
There are four weeks in December.
In September there are 4 weeks, in October about 5, in November 4, in December 5, in January 4, in Februar,4, in March 4, in April, 4, in May 4, so from September to June there are 38 weeks.
There are 4 weeks and 3 days in December.