13 Calendar

It wasn’t just the Mayans who invented their own calendar. Just about every early culture featured some form of classification for the passage of days. The Mayans gained notoriety in 2012 because it was the end of one of their great calendrical cycles—the long count, or b’ak’tun. It wasn’t the end of the world—more like turning the page on one of those cheap insurance company calendars. Bummer.

Most cultures start with lunar calendars and eventually switch to solar calendars, either fully or reluctantly. Hebrew, Muslim, Eastern Orthodox, and Chinese calendars are still used today, with different year values and lunar features. Julius Caesar took a stab at updating the Roman calendar system—before the Senate took various stabs at him. ...

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