There were three major precautions taken by the enemies of Jesus that give us circumstantial evidence of His resurrection. Why do you seek the living among the dead? The feast of first fruits is about presenting your first fruits to God almighty. We celebrate the resurrection of the entire church of Jesus Christ.
Christianity is an extension of our Jewish faith. Jesus is a Jew!!! Escaping judgement can only be through the blood of Jesus. On the 14th of Nissan at high noon Jesus was bound to the to the cross and soon wiped away all the sins after saying it is finished.
Jesus will be the fulfillment of the Feasts. Seven feasts over three events. He (Jesus) fulfilled the feasts perfectly.