Over the course of centuries, a calendar with no leap years would eventually become totally out of sync with the seasons as we know them. Let’s see what would happen. Leap years exist because we need ...

This article is a modified and updated version of one I wrote in—oddly enough—2008 and then updated for 2012. Barring a colossal asteroid impact or a Trump presidency, I’ll probably be around to do it ...

"American society today is hardly recognizable from what it was a century ago. Integrated schools, an information economy, and independently successful women are but a few of the remarkable changes ...

A: A tropical year is the time (365.242199 days) the earth takes to revolve around the sun once. By having just 365 days in a calendar year, 0.242199 days are lost each year. To correct this error, ...