http://en.wikipedia.org/wiki/Timeline_of_the_Second_World_War#December_71941
December 7: Japanese aerial attack on Pearl Harbor brings United States and Japan into the war. Air attacks also on Hong Kong, Singapore, Malaya, Thailand, the Philippines, and Shanghai.
1945
September 2: Japan signs the articles of surrender on the deck of the USS Missouri in Tokyo Bay.
From and including: Sunday, December 7, 1941
To, but not including : Sunday, September 2, 1945
It is 1365 days from the start date to the end date, but not including the end date
Or 3 years, 8 months, 26 days excluding the end date
Alternative time units
1365 days can be converted to one of these units:
117,936,000 seconds
1,965,600 minutes
32,760 hours
195 weeks
From and including: Thursday, March 20, 2003
To, but not including : Monday, July 31, 2006
It is 1229 days from the start date to the end date, but not including the end date
Or 3 years, 4 months, 11 days excluding the end date
Alternative time units
1229 days can be converted to one of these units:
106,185,600 seconds
1,769,760 minutes
29,496 hours
175 weeks (rounded down)
http://www.timeanddate.com/date/duration.html2,577
http://www.antiwar.com/casualties/