Too much math. YouTube: Neil deGrasse Tyson explains the logic behind the leap year, with a brief history in calendars as well.
posted by PlayhousePals 8 years 2 months 3 weeks ago • 133 views • 3:22search results matching tag: gregorian calendar
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... and now you know.
posted by PlayhousePals 8 years 4 months 2 weeks ago • 1,250 views • 3:57- 1