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Posted at 03:22 PM ET, 02/29/2012

Leap year, in context

Leap Year Day, Feb. 29, is but one of many days . . .

To explain, a chart.

I realize that these have developed into an addiction. (MS Paint)
For more diagrams... Moments of Venn

By  |  03:22 PM ET, 02/29/2012

Tags:  Venn

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