"a year can only start on one of seven days, so there are seven possible basic calendars." - Never coded a date library http://unitedcats.wordpress.com/2010/10/04/this-october-has-5-fridays-5-saturdays-and-5-sundays-all-in-one-month-it-happens-only-once-in-823-years/ …
9:06 AM - 6 Apr 2012
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