As Iranians celebrate the Persian New Year, explore the fascinating calendars still used around the world—shaped by sun, moon ...

For centuries, churches have used different methods to calculate the date of Easter. Rarely do they coincide. The search for ...

A calendar notation in which the date is represented by one number. For example, the Julian date for December 11, 1942 is 2430705; while December 12, 1942 is 2430706. The Julian date is widely ...

You might remember the phrase "beware the Ides of March" from your high school English class. Here's what it means and when ...