What is the Christian moveable feast that falls on the Sunday before Easter?

The Christian moveable feast that falls on the Sunday before Easter is Palm Sunday.

Palm Sunday commemorates Jesus Christ’s triumphal entry into Jerusalem, when crowds are described in the four canonical Gospels as welcoming him with branches. The feast begins Holy Week, the period leading through Maundy Thursday and Good Friday to Easter Sunday.

Many churches bless and distribute palm leaves during Palm Sunday services. In regions where palms do not grow, congregations may use olive, willow, box, or yew branches instead. Worshippers sometimes weave the leaves into crosses and keep them in their homes.

Palm Sunday’s date changes every year because Easter is a moveable feast. In Western Christianity, it occurs six days before Easter Sunday. Eastern and Western churches can sometimes observe it on different dates because they use different calendars and methods for calculating Easter.