How many days are there from November 12 2009 until December 13 2009?

To November 12th to December 13??? Well I think it will be 31 days because there are 30 days in November and 31 days in December. So add up how many weeks are left in November and December, count up the extra days that were left(only between November 12th to December 13th) and there you have 31 days.