Thursday the 24th of November 2011.
Adding 180 days to May 22, 2011 gives November 18, 2011.
There are 31 days in May, 30 in June and 31 in July. 180 days after May 9, 2011 is August 7, 2011.
The 1st of November 2011.
Adding 180 days to November 23, 2010 gives May 22, 2011.
Thursday, May 12th, 2011 falls 120 day after January 12th, 2011.
The 31st of May 2011.
180 days from Nov 2 2010 till May 1st 2011.
The date which falls 90 days after February 2, 2011 is May 3, 2011.
Adding 180 days to November 6, 2010 gives May 5, 2011.
Adding 120 days to January 27, 2011 gives May 27, 2011.
Adding 120 days to January 28, 2011 gives May 28, 2011.
Subtracting 387 days from May 13, 2011 gives April 21, 2010.