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I never remember if we have 30 days or 31 in most months... nope, actually I got everything right except for May and March.

http://www.calendarzone.org/calendar/2012-calendar-10.jpg



Here's a trick for that (courtesy of Shari Lewis): hold your knuckles up in front of you, index fingers together, no thumbs. Each peak represents a month with 31 days. Each valley represents a month with 30 (or 28, for February) days.




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