Palm Sunday : The Sunday next before Easter; -- so called in commemoration of our Savior's triumphal entry into Jerusalem, when the multitude strewed palm branches in the way.

Example:


Taxonomy
Palm Sunday, Jerusalem, donkey, Jesus, colt, procession, riding, palm branches, palms, branches, the church, palm fronds, foal, horse, the Messiah, tradition, Lord, Triumphal Entry.

Defination from the web:
Palm Sunday observances by Nestorian Christians in China, wall painting, Khocho, Nestorian Temple, 683–770 AD, Tang Dynasty ... In any event, that would mean that the events of Palm Sunday actually occurred on Monday, being five days before (John 12:1-12) ...