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 Algorithm for a Perpetual calendar 

Dear Mr.Netscr1be, my english is not good, sorry. Please see by http://commons.wikimedia.org/wiki/Category:Perpetual_calendars the file ""Permanent_Calendar"" and http://commons.wikimedia.org/wiki/Wikitable_calendar. Here is a simple solution. The result is very easy to control. The algorithm is: The days of the week for January and February are the first line in the second from February through December. I wish you much fun. greetings from saxony Karl Nimtsch   "