How did calendar systems come into being? How have they evolved over time?
Greg Reese covers the history of these time-keeping charts, beginning with the writings of Artistotle and Apollonius of Rhodes. The migrations of birds and changing weather patterns all played a part in establishing seasons and larger calendars.
Most of us figured out early that winter is when it’s coldest, summer is when it’s hottest and spring and fall are in between. But contrary to the official calendar dates of winter, the coldest quarter usually begins around December 8, weeks before the official date, and ends March 9. And the official summer dates on the calendar miss out on some of our warmest months. So what gives? Video blog host Joe Hanson erases the question marks in this edition of It’s Okay to be Smart.
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