Palm Sunday is a Christian festival. It is always happens on a Sunday but the date each year changes. It is a day to celebrate the day that Jesus entered the city of Jerusalem in Israel as was written about in the Bible in Mark 11:1-11, Matthew 21:1-11, Luke 19:28-44, and in John 12:12-19. During Palm Sunday many Christians celebrate with Crosses made out of Palm leaves and by going to church.