For more than 400 years, Catholic and Orthodox churches have used different ways to determine the date of Easter. But this Easter marked a special moment for Christians, as the churches celebrate of ...

Due to the complexities of the various types of calendars, the date of Easter can be as early as March 22 and as late as April 25. Here's why.

The Eastern Orthodox and Roman Catholic observances overlap only every three to four years thanks to different church calendars — and different lunar cycle calculations.

Western churches adopted the Gregorian calendar in 1582, while the Eastern Orthodox Church kept the older Julian one.

The idea of a common Easter has been discussed since the 1960s, with interest peaking when celebrations coincide, as they ...

Easter 2025 will be celebrated on April 20, but the date isn’t fixed. It is determined using a centuries-old formula tied to ...

The Gregorian calendar, instituted by Pope Gregory XIII ... matter for thousands of years because of the intricacies of ...

That’s because Islam follows the lunar calendar, based on the moon’s cycles – unlike the Gregorian calendar, which follows the sun. As such, dates on the Islamic calendar come 10–12 days earlier each ...

The Hebrew calendar assigns great weight to the lunar cycle. Passover was celebrated ... accepted Pope Gregory’s reform — the “Gregorian” calendar — non-Catholic countries did not.

In the Gregorian calendar ... Easter’s date changes because it is based on the lunar calendar, much like Lunar New Year. According to The Old Farmer’s Almanac, Easter Sunday always falls ...