The 25th of October 2011.
Adding 180 days to April 11, 2011 gives October 8, 2011.
Adding 180 days to April 1 2011 gives September 28, 2011.
October 13, 2010 + 180 days = April 11, 2011.
April 18, 2011
April 10th 2012.
16 April 2012.
April 4, 2012
April 10, 2012
Adding 180 days to October 4, 2010 gives April 4, 2011.
Adding 180 days to October 9, 2010 gives April 7, 2011.
Adding 180 days to October 29, 2010 gives April 27, 2011.
Adding 180 days to October 6, 2010 gives April 4, 2011.