Subtracting 126 days from December 10, 2010 gives August 6, 2010.
The date which falls 90 days after December 4, 2010 is March 4, 2011.
The date which falls six months after December 17, 2010 is June 17, 2011.
Adding 120 days to December 3, 2010 gives April 2, 2011.
Adding 240 days to December 23, 2010 gives August 20, 2011.
Adding 120 days to December 23, 2010 gives April 22, 2011.
Adding 120 days to December 14, 2010 gives April 13, 2011.
Adding 120 days to December 13, 2010 gives April 12, 2011.
Adding 179 days to December 20, 2010 gives June 17, 2011.
Sunday, September 26 2010 is 90 days before December 25 2010.
150 days after Saturday, July 10th, 2010 = Tuesday, December 7th, 2010.
The 10th of November 2009.
The December solstice often falls on that date.