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.

A lunar year consists of 12 lunar months, totalling approximately 354 days. Gregorian Calendar: In contrast, the Gregorian ...

The lunar calendar is a system based on the moon's cycles, unlike the Gregorian calendar, which follows the solar cycle. It ...

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

Our goal is to create a lunar calendar that: Continues to integrate biological and ecological cycles. Overlay or combine the current Gregorian calendar so tribal members can still keep appointments.

normally use either a lunar calendar or a lunisolar calendar. In the UK, the standard calendar is the Gregorian Calendar (based on a calendar from the Roman Empire) which is a solar calendar.

The Islamic calendar is based on lunar cycles, not the Gregorian calendar, which is why the exact date of Ramadan changes each year. As the charity Muslim Aid says: "The Islamic calendar follows ...

Some observances are longer than others. The Lunar New Year is based on a different calendar than the Gregorian calendar, which many Western countries, including the US, use. The calendar is based ...