Nov 17th plus 30 days would be Dec. 17, plus 30 days would be Jan 16, plus 31 days would be February 16, plus 29 days is March 16, 2012.
120 days sfter November 17 2011 fell on Friday March 16, 2012. This site does the calculations for us.
Other people asked questions on similar topics, check out the answers they received:
Other people asked questions on various topics, and are still waiting for answer. Would be great if you can take a sec and answer them