There was an extra day because it was a leap year
2004 was a leap year, so there were 29 days.
2004 was a leap year - therefore, February 2004 had 29 days.
366
366. 2004 was a leap year.
366 because 2004 was a leap year.
There were 31 days in December 2004.
1996, 2000, 2004, 2008 and 2012 each had 366 days. Every other year since 1995 (including 1995) had 365 days.
28
There were twenty-nine days in February 2004.
In 2004 the month of March had 31 days.
24 days
366