8.

Palm Sunday is observed by Christians

to remember the

To remember the arrival of Jesus Christ in Jerusalem for the festivities of the Jewish Passover.

Explanation:

As the Gospels narrate, Jesus decides to go to Jerusalem with his disciples for the Jewish Passover. He knew what was going to happen. He would be apprehended by the pharisees and taken to the Romans to be punished. Lord Jesus knew his passion and death were approaching. He arrived in Jerusalem on a donkey, a scene that had been envisioned by prophet Isaiah and is found in the Old Testament.