180 days after July 17th 2010 is Thursday, January 13, 2011.
180 days after July 8 2010 would be on January 4 2011.
Adding 180 days to July 28, 2010 gives January 24, 2011.
July 13 2010 plus 180 days is Sunday, January 9, 2011.
Adding 180 days to July 20, 2010 gives January 16, 2011.
Adding 180 days to January 17 on a non-leap year gives July 16. Adding 180 days to January 17 on a leap year gives July 15.
180 days after May 11 2010 is Sunday, November 7, 2010.
Adding 180 days to April 2, 2010 gives September 29, 2010.
January 19th, 2014 is exactly 180 days after July 23rd, 2013.
Adding 180 days to March 18, 2010 gives September 14, 2010.
January 31 + 180 days = July 30.
September 1, 2010 + 180 days = February 28, 2011.
October 13, 2010 + 180 days = April 11, 2011.