Numbers 28:16-18 (KJV)
16 And in the fourteenth day of the first month is the passover of the Lord.
17 And in the fifteenth day of this month is the feast: seven days shall unleavened bread be eaten.
18 In the first day shall be an holy convocation; ye shall do no manner of servile work therein:
Numbers 28
Jesus Died During The Preparation Of The Passover
Atonement was made through Jesus’s death. Don’t listen to anyone that says it was made anywhere else but the cross.