Palm Sunday is a Christian moveable feast that falls on the Sunday before Easter. The feast commemorates Jesus' triumphal entry into Jerusalem, an event mentioned in all four canonical Gospels.

In many Christian churches, Palm Sunday is marked by the distribution of palm leaves (often tied into crosses) to the assembled worshipers. The difficulty of procuring palms for that day's ceremonies in unfavorable climates for palms led to the substitution of boughs of box, yew, willow, or other native trees. The Sunday was often designated by the names of these trees, as Yew Sunday, or by the general term Branch Sunday.

In the accounts of the four canonical Gospels, Jesus' triumphal entry into Jerusalem takes place about a week before his Resurrection.

In some of the Orthodox Church, Palm Sunday is often called the "Entry of the Lord into Jerusalem", is one of the Twelve Great Feasts of the liturgical year, and is the beginning of Holy Week.