The 1st of September 2018.
Subtracting 180 days from February 28, 2016 gives September 1, 2015.
The 21st of February 2012 is 180 days before it. The 15th of February 2013 is 180 days after it.
The date 180 days after February 8, 2011 would be August 7, 2011.
Adding 180 days to February 28, 2011 gives August 27, 2011.
March 31
Adding 180 days to February 9, 2011 gives August 8, 2011.
Adding 180 days to February 3, 2010 gives August 2, 2010.
Adding 180 days to February 26, 2011 gives August 25, 2011.
Adding 180 days to February 24, 2011 gives August 23, 2011.
September 1, 2010 + 180 days = February 28, 2011.
The 20th of April 2016.
The 15th of January 2016.