20 days after Tuesday, January 1, 2013 is Monday, January 21, 2013.
31 days after Tuesday, January 1, 2013 is Friday, February 1, 2013.
0 days after Friday, February 1, 2013 is Friday, February 1, 2013.
32 days after Tuesday, January 1, 2013 is Saturday, February 2, 2013.
0 days after Friday, April 5, 2013 is Friday, April 5, 2013.
28 days after Friday, February 1, 2013 is Friday, March 1, 2013.
59 days after Tuesday, January 1, 2013 is Friday, March 1, 2013.
100 days after Monday, June 10, 2013 is Wednesday, September 18, 2013.
300 days after Saturday, July 20, 2013 is a date not in 2013.
2 days after Friday, December 20, 2013 is Sunday, December 22, 2013.