Easter and the Gregorian Calendar
Easter is a Christian holiday celebrating the resurrection of Jesus Christ. Its date varies each year because it is determined by the Gregorian calendar, which is the most widely used civil calendar today. Easter falls on the first Sunday after the first full moon following the vernal equinox. This calculation links Easter to both lunar and solar cycles, resulting in a movable feast that can occur between March 22 and April 25.
Easter and the Gregorian Calendar
Easter is a Christian holiday celebrating the resurrection of Jesus Christ. Its date varies each year because it is determined by the Gregorian calendar, which is the most widely used civil calendar today. Easter falls on the first Sunday after the first full moon following the vernal equinox. This calculation links Easter to both lunar and solar cycles, resulting in a movable feast that can occur between March 22 and April 25.
💡 Key Takeaways
- Understand how Easter’s date is calculated using the computus: the first full moon after the vernal equinox determines Easter Sunday.
- See why Easter moves each year and how Gregorian calendar rules shape its date.
- Learn about the switch from the Julian to the Gregorian calendar and its impact on Easter dating.
- Compare Western (Gregorian) Easter with Orthodox Easter and why the dates can differ.
❓ Frequently Asked Questions
What is Easter?
Easter is the Christian holiday celebrating Jesus’ resurrection, observed on a Sunday each year. In Western churches, its date changes annually based on a calculation called computus.
What is the Gregorian calendar and why is it used for Easter?
The Gregorian calendar, introduced in 1582 to correct drift in the Julian calendar, is the de facto global civil calendar. Western Easter dates are determined using this calendar.
How is the date of Easter determined in the Gregorian system?
Easter is found by computus: it is the first Sunday after the Paschal Full Moon, which is the first full moon on or after March 21 (the fixed vernal equinox).
Why do Western and Orthodox Easters sometimes fall on different dates?
Western Easter uses the Gregorian calendar and its lunar rules, while Orthodox Easter often uses the Julian calendar and different lunar calculations, leading to different dates.