Based on the question being asked on the 13th of May 2013, the answer is the 8th of September 2012.
28 weeks.
52, and one day.
From the end of April 2013 to the start of January 2014 is 40.3 weeks, approx.
26 weeks
There are about 134½ weeks between 1 January 2011 and 31 July 2013.
The X Factor - 2011 Auditions 1 3-1 was released on: USA: 11 September 2013 Japan: 21 September 2013 Hungary: 28 September 2013
125 weeks and 4 days.
Dream Season - 2013 was released on: USA: 10 March 2013 (FilmSlam)
We are in the 5th month of the year so there are 7 more months to this year. Each month has 4 weeks. 4 x 7 = 28 weeks. From January 2013 to September 2013 is 9 months. 9 x 4= 36. Now add 28 + 36 to get the total number of weeks in your question.
There are 62 weeks between those two dates.
Click on This - 2011 Grand Prix 2013 IndyCar was released on: USA: 1 September 2013
The Willis Report - 2011 2013-09-30 was released on: USA: 30 September 2013
The Car Coach - 2011 2013 Scion xB was released on: USA: 19 September 2013
119 weeks.
Paternity Court - 2013 Weeks vs- Moore 1-2 was released on: USA: 23 September 2013
Jessie - 2011 G-I- Jessie 2-26 was released on: USA: 13 September 2013 UK: 27 September 2013