Jesus fulfilled Passover to the in that He is our Passover Lamb that was sacrificed for us on the Passover. He fulfilled the Feast of Unleavened bread in that His holy body saw now decay or corruption. He fulfilled the Feast of Firstfruits in that he was raised from the dead on the very day of the feast. He is the firstfruits of those who will come forth from the grave. And on the day of Pentecost (first day of the Feast of Pentecost), the Holy Spirit descended and baptized the church. He permanently indwells believers. He brought believers into union with Jesus and one another.