Tag: calendars

The science of calendars

(A slightly updated version of a New Year’s perennial of mine…) It’s almost 2013, which means it’s time to take down your old Harry Potter calendar and put up your new one (if you’re my 11-year-old daughter). Okay, so maybe you have a Teddy Bears calendar instead, or a Glee calendar. The point is, for …

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Leap year

This week saw, not just a once-in-a-lifetime event, but a once-in-four-centuries event: the first February 29 to fall in a year ending in 00 since 1600. The three basic elements of the calendar are the day, month and year. The day is the time it takes the Earth to rotate once: 24 hours. The month …

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