Doesn't Scripture say Christ was the Passover Lamb slain for us. The 15th of Nissan is Passover, The High Holy Sabbath of Israel. The lamb was slain at least one day before (Preparation Day) because no work, ie. food preparation, could take place on the Sabbath, any Sabbath. All of God's Feast Days were Sabbaths. These Feast Days were not always on the same day as the regular weekly Sabbath.
Buried in haste before sunset (our Wednesday about 6 p.m.), before the "high day" (the first day of the Feast began), our Wednesday sunset
"THE FIRST DAY OF THE FEAST" - "THE HIGH DAY" (Yom tov) - THE 15TH DAY OF NISAN.
(Our Wednesday sunset to Thursday sunset.)
THE FIRST NIGHT AND FIRST DAY IN THE TOMB.
THE SECOND DAY OF THE FEAST - THE 16TH DAY OF NISAN.
(Our Thursday sunset to Friday sunset.)
THE SECOND NIGHT AND SECOND DAY IN THE TOMB.
THE THIRD DAY OF THE FEAST - "THE (WEEKLY) SABBATH" - THE 17TH DAY OF NISAN
(Our Friday sunset to Saturday sunset.)
THE THIRD NIGHT AND THIRD DAY IN THE TOMB.
"THE FIRST DAY OF THE WEEK" - THE 18TH DAY OF NISAN
(Our Saturday sunset : "the third day" of Matt. 16:21, &c.; not the third day of the Feast.)
Thus the Resurrection of the Lord took place at our Saturday sunset or thereabouts on "the third day"; cp. "after three days" (Matt. 27:63. Mark 8:31.).
Mar 15:42 And now when the even was come, because it was
the preparation, that is, the day before the sabbath,
Mar 15:43 Joseph of Arimathaea, an honourable counsellor, which also waited for the kingdom of God, came, and went in boldly unto Pilate, and craved the body of Jesus.
Mar 15:44 And Pilate marvelled if he were already dead: and calling unto him the centurion, he asked him whether he had been any while dead.
Mar 15:45 And when he knew it of the centurion, he gave the body to Joseph.
Mar 15:46 And he bought fine linen, and took him down, and wrapped him in the linen, and laid him in a sepulchre which was hewn out of a rock, and rolled a stone unto the door of the sepulchre.
Mar 15:47 And Mary Magdalene and Mary the mother of Joses beheld where he was laid.
Mat 28:1 In the end of the sabbath, as it began to dawn toward the first day of the week, came Mary Magdalene and the other Mary to see the sepulchre.
There were two Sabbaths that week, The High Holy Sabbath (PASSOVER) and the weekly Sabbath. The First Day of the feast days were Sabbaths.
That the first day of each of the three feasts, Passover, Pentecost, and Tabernacles, was "a holy convocation", a "sabbath" on which no servile work was to be done. See Lev. 23:7, 24, 35. Cp. Ex. 12:16.
"That Sabbath" and the "high day" of John 19:31, was the "holy convocation", the first day of the feast, which quite overshadowed the ordinary weekly sabbath.
It was called by the Jews Yom tov ( = Good day), and this is the greeting on that day throughout Jewry down to the present time.
This great sabbath, having been mistaken from the earliest times for the weekly sabbath, has led to all the confusion.