What Day Is Easter and How Its Date Is Determined

Introduction — Why “what day is Easter” matters

Knowing what day is Easter is important for religious observance, public holidays and cultural events across many countries. Unlike fixed-date holidays, Easter moves each year because its date is tied to lunar and solar cycles. Understanding the rules behind the date helps planners, faith communities and the public prepare for Lent, Easter services and associated traditions.

Main body — How the Easter date is calculated

The basic rule

Ecclesiastically, Easter is celebrated on the first Sunday after the Paschal full moon — a convention that uses a mathematical approximation of the first astronomical full moon occurring on or after 21 March, the nominal date of the vernal equinox. The common shorthand ‘‘Easter is the first Sunday after the full moon that occurs next after the vernal equinox’’ is an approximation of more detailed ecclesiastical rules.

Calendar differences and historical context

Historically, different calendars have affected the date. In Roman times the Julian calendar was used; later the Gregorian calendar was introduced and produces different correspondences with astronomical events. In 1923, a congress of Eastern Churches adopted a modified Gregorian calendar and chose to set Easter according to the astronomical full moon at the meridian of Jerusalem. The astronomical vernal equinox is the instant when the Sun has zero apparent ecliptic longitude; timings can produce subtle differences — for example, in 1962 the astronomical full moon occurred on 21 March at UTC 7:55, about six hours after the astronomical equinox.

Recent and near-future dates

Practical examples show variation: Easter Sunday in 2026 falls on 5 April, and Orthodox Easter that year is noted as 12 April. Many Easters fall in April — about 77% of Easter Sundays (384 out of 500) occur in April. As another upcoming example, Easter in 2028 is on 16 April.

Conclusion — What this means for readers

When asking what day is Easter, remember the date depends on ecclesiastical rules that approximate astronomical events and can vary with calendar systems. For planners and worshippers, checking the published date for each year (and for different church traditions) is the practical step. The movable nature of Easter also explains why public holiday schedules and seasonal customs shift year to year.