Yes, this page is still embryonic, but there is much to discuss here in regards to deprogramming. Firstly, some links to two calendar years with missing days. These are the reform years, for the Vatican and the Anglican, respectively:

http://www.edkohout.com/cave/Gr-1582.html

http://www.edkohout.com/cave/Gr-1752.html

The Pope was made to remove 10 days from October of 1582, leaving 21 days. The English, however, chose to remove 11 days from September, leaving 19 days. In both cases, 355 days remained in the entire year, which is the number of days in a "leap year" in the Islamic calendar.