The Holy week starts with the triumphal entry. This is when Jesus rode on a donkey and entered Jerusalem while the people waved palm branches and laid them on the ground before him, which is why it's also called Palm Sunday. This event marks the beginning of the Holy Week, which culminates in Easter Sunday. During this week, Jesus celebrated the Last Supper with his disciples, was betrayed by Judas, arrested, tried, crucified, and buried. It is a significant time in the Christian faith and is commemorated by believers around the world.