What Christian day commemorates Jesus’s entry into Jerusalem before Easter?

The Christian day commemorating Jesus’s entry into Jerusalem before Easter is Palm Sunday.

Palm Sunday is observed on the Sunday before Easter Sunday and begins Holy Week in many Christian calendars. The Gospel accounts describe crowds welcoming Jesus into Jerusalem with branches, commonly identified as palm branches, and Christians commemorate the event with processions, readings and the distribution of blessed greenery.

Where palm trees are unavailable, churches may use local branches such as olive, willow or yew. In many traditions, worshippers take the branches home, and some are later burned to provide ashes for the following year’s Ash Wednesday. Palm Sunday is not the same as Easter Sunday: it recalls the entry into Jerusalem and leads into the Passion observances of Holy Week.