Adding 90 days to March 29, 2011 gives June 27, 2011.
March 29 2009 was 90 days after December 29 2008.
90 days after March 13, 2011 would be June 11, 2011.
The 24th of March 2011 is 90 days before it and the 20th of September 2011 is 90 days after it.
90 days after December 1st is Tuesday, March 1, 2011.
Counting from December 1, 2011, adding 90 days to this date gives February 29, 2012.
90 days after Tuesday, December 28, 2010 = Monday, March 28, 2011.
Adding 90 days to December 23, 2010 gives March 23, 2011.
March 27, 2012
1st March 2012
March 21, 2012
Assuming you mean the 29th of January 2011, it is 90 days.
The date which falls 90 days after December 4, 2010 is March 4, 2011.