noun
a religious holiday that falls on different dates in different years
• Syn: ↑moveable feast
• Hyponyms: ↑Easter, ↑Passover, ↑Pesach, ↑Pesah, ↑Feast of the Unleavened Bread
* * *
a religious festival, such as Easter, whose date changes from year to year
Useful english dictionary. 2012.