Days are evening to morning or any part of the day, right ? Then the next day starts at sundown
Fascinating subject .. Didn't Jesus die at the preparation day about the time the Temple priest was to kill the Passover lamb ?
Again here, just my opinion:
Approximate Nisan 14 timeline:
Nisan 14 began at sundown. Jesus eats his last supper with his chosen 12 (7-9pm). They go the Garden of Gethsemane & Jesus prays (9pm -midnight) He is arrested (midnight) the Priests accuse, abuse & condemn Him (midnight-6am). He's taken to Pilate questioned, abused, scourged & sentenced to death (6am til 8am). Nailed to the cross (9am) suffers til & dies at (3pm) all on Nisan 14.
Christ death shadows Temple tradition:
At 9am on Nisan 14 the Temple Priest tied the lamb to a stake to be sacrificed. The Priest then blows the shofar (rams horn/trump). So all the people knew the chosen lamb is prepared to be sacrificed.
Early Nisan 14 God's sinless Lamb/Christ was carrying his cross, marching up the hill to Calvary. At 9am (Mk 15:25) on Nisan 14 Jesus the Lamb of God is tied and nailed to the cross.
3pm on Nisan 14 the Temple Priest brings a sharp knife and kills the sinless lamb. The Priest then blows the shofar (rams horn/trump). So, all the people know the Passover lamb as been sacrificed/killed.
At 3pm (Mk 15:33) on Nisan 14 Jesus Christ hears the Temple trump and in a loud voice (Jn 19:28 & 30) Jesus proclaims: tetelestai/It is FINISHED/Sin required wage: Paid in Full & dies. tetelestai/also an accounting term meaning Completed/Paid in Full.
Jesus passes through the Temple Veil & a great earthquake happens, the Veil is torn in 1/2. (Matt 27:51) Old covenant Levitical priesthood sacrificial system retirement begins here.
At Pentecost the old covenant (written on stone) is rendered obsolete. New covenant indwelling Holy Spirit (written on the heart) begins.