Feb. 29 is more than just an extra day we have once every four years. There is some science behind it. Here's how leap days came to be.

According to Live Science, the discovery sheds new light on the ancient Egyptian celebration of Wepet Renpet, or the Opening of the Year, a festival that was central to their culture and calendar.

The Romans added January and February to the calendar but ran into a problem — math and superstition. Here's why February ...

How he found the solution of the mystery of the ancient Mayan calendar, the oldest time-counting system in the world, was explained yesterday by Dr. H. J. Spinden of the Peabody Museum in an ...

We’re way ahead of anyone in Britain. Ancient Egyptian: What have you got in this linen sack thing anyway? Oh, a calendar! Now that is useful. It’s similar to our own solar calendar which has ...