Adding 90 days to December 23, 2010 gives March 23, 2011.
90 days after Tuesday, December 28, 2010 = Monday, March 28, 2011.
Sunday, September 26 2010 is 90 days before December 25 2010.
The date 90 days after August 25 2010 was Tuesday, November 23, 2010. 90 days before it was Thursday 27th of May 2010.
Adding 90 days to December 23 heading into a non-leap year, gives March 23 of the following year. Adding 90 days to December 23 heading into a leap year, gives March 22 of the following year.
The date which falls 90 days after December 4, 2010 is March 4, 2011.
120 days after August 9 2010 is Tuesday, December 7, 2010.
Adding 90 days to September 30, 2010 gives December 29, 2010.
Adding 90 days to November 25 2010 gives February 23, 2011.
March 31
30 days after November 24, 2010 is Friday, December 24, 2010.
90 days after December 1st is Tuesday, March 1, 2011.
March 29 2009 was 90 days after December 29 2008.