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?

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

Hindu Nav Varsh marks the beginning of a new lunar or solar calendar in India, celebrated with rituals symbolizing prosperity ...

Due to the lunar cycle of the Islamic Hijri calendar, Ramadan and Eid occur approximately 11 days earlier each year.

Easter's date is based on the lunar calendar. Easter is observed on the first Sunday ... according to the Old Farmer's ...