This means its date on the Gregorian calendar can vary every year. The date of Easter Sunday falls on the first Sunday after the first full moon following the vernal equinox in March.

What determines when Easter is each year?

The simple standard definition of Easter is that it is the first Sunday after the full Moon that occurs on or after the spring equinox. If the full Moon falls on a Sunday then Easter is the next Sunday.

Why is Easter at a different time every year?

Easter's exact date varies so much because it actually depends on the moon. The holiday is set to coincide with the first Sunday after the Paschal Full Moon, the first full moon after the vernal equinox. ... Because the Jewish calendar is tied to solar and lunar cycles, the dates of Passover and Easter fluctuate each year.