1227 weeks.
7067 days between 28 August 1990 and 2 January 2010.
39 weeks.
52
From the end of April 2013 to the start of January 2014 is 40.3 weeks, approx.
There are 17 weeks and 3 days between September 1 and January 1.
1/9 to 1/31 is three weeks. Since there are 52 weeks in a year, 1/31 to the following 1/9 is 49 weeks.
There are 4 weeks in January 2011
52 weeks and 1 day.
52 weeks and 1 day.
4 weeks and 2 days.
Between January 1 and October 31 there are 39 weeks.
5
All 50 states have had tornadoes since 1990.
41 weeks.
12 weeks 5 days
In January 2012 there were 4 weeks and 3 days.
Between January 1 and November 1, 2010 there were 43 weeks and 2 days.