Jesus was slain on the cross and His blood shed for our iniquities. Death could not hold him. For He died and rose again claiming the victory.
As Christians the Passover has gotten somewhat muddled with Easter. Though in the Bible we are told of the Passover and not of Easter. So let us observe the Passover for what it is and symbolises. When Jesus died on the cross He became the ultimate sacrificial lamb, sent down from heaven to save mankind. So let us all observe the Lord's Passover and not forget why this deserves remembrance and observation.
You can read about the Passover in the Bible in Exodus 12
You can read more about Jesus' resurrection Luke 24