Sunday, September 26 2010 is 90 days before December 25 2010.
Subtracting 126 days from December 10, 2010 gives August 6, 2010.
731 days after it is Saturday the 15th of December 2012. 731 days before it is Sunday the 14th of December 2008.
Sunday the 5th of December 2010.
The date which falls 90 days after December 4, 2010 is March 4, 2011.
The date 350 days from 15 December 2010 is Wednesday, November 30, 2011.
What date is 90 days before December 25 2012
Adding 120 days to December 6, 2010 gives April 5, 2011.
Adding 120 days to December 24, 2010 gives April 23, 2011.
Adding 285 days to December 15, 2010 gives September 26, 2011.
328 days before the question was asked, on the 9th of November 2011, the date was the 16th of December 2010. The question is being answered on the 1st of January 2015, at which time the date 328 days before that is the 7th of February 2014.
330 days after January 7, 2010 is December 3, 2010.
Adding 179 days to December 20, 2010 gives June 17, 2011.