Including the start and end date in the calculation, there are 162 days between the two dates.
There are 365 days inclusive between December 25, 2009 and December 25, 2010.
Between December 21, 2009 and June 21, 2010 there are 183 days inclusive.
From 29th December 2009 until March 22, 2010 there are 84 days inclusive.
There are 392 days from 28 November 2009 until Christmas Day 25 December 2010.
There were 31 days in December 2010.
Depending where in the world you live when you work this question out, as of December 30, 2009 until 1st September 2010 (spring in Australia) there are 245 days.
From December 28, 2009 until March 21, 2010 there are 83 days inclusive.
From December 30, 2009 until March 15, 2010 there are 76 days inclusive.
It's not clear whether you want those two dates included in the count. Tell you what ! Here's a list of all the days in that neighborhood. You should be able to count the ones you're interested in. December 28, 2009 December 29, 2009 December 30, 2009 December 31, 2009 January 1, 2010 January 2, 2010
Including the start and end dates in the calculation, there are 365 days between the two dates.
245 days until December 9 2010 (from April 8 2010).
Between July 23, 2009 and December 31, 2009 there were 161 days.