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

We once used to embrace a 13-month calendar, and some cultures still follow this format. So why are they 12 months instead of 13?

The months in the Chinese lunar calendar are based on the phases of the moon. Each month begins with the new moon, and a typical lunar month lasts about 29.5 days. According to one Chinese astrologer, ...

And sometimes — once in a blue moon — the moon is full twice in a month (or four times in a season, depending on which definition you prefer). If you want to know what you can see tonight ...

For nearly 2 billion Muslims around the world, Ramadan is a time of deep reflection, spiritual connection and community.

Discover when Easter falls in 2025 and why its date hops around each year. Here's when to make your Good Friday and Easter plans.