We are having a disconnect here. I do not know about a high day and wonder if the scriptures tells us about it. I have followed the writings of Mark and John and can definitely follow an 8 day blueprint for the whole week and the beginning of a new week. In this blueprint Jesus is in the tomb only one full day as we would define a full day. The day in the tomb is a metaphor for the one thousand year day called in scripture "the day of the LORD. It is called a day of rest. Jesus had finished his work of redemption. He had worked for 6 days and there is one day left. When the women came to anoint Jesus body he had just been put in the tomb. That was day 1. In the thinking of a Jew any part of a day counts for the full day. Jesus rose from the dead very early on the eighth day. It was counted as a full day.
If we get this right we will learn two things. The Bible is a spiritual book wherein even this must truth be taught of the Spirit, and two, there will no be post mil or amil but we will know the thousand years in Re 20 is a day as God counts a day. The seven day crucifixion week is a picture of the seven thousand years of human history in this 7 day redemptive cycle. I have shown each day of the 7 in John and Mark with this ending in Matthew.
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.
It is not the end of the high day on Wednesday..
Here is a corresponding prophetical metaphorical addition to the story. This has the end of the "day of the Lord," picturing the full day in the tomb. The Sabbath rest of Christ. The beginning of a new day. Everything will be new in this day. The end of this day "day of God," which is an eternal day with no night.
10 But the "day of the Lord" will come as a thief in the night; in the which the heavens shall pass away with a great noise, and the elements shall melt with fervent heat, the earth also and the works that are therein shall be burned up.
Note: When the text says "in the which" these things will happen to the earth and heavens and the elements, please understand the events will happen as described sometime in the day. It is not when the day of the Lord first comes but we know these events will end the day of the Lord and begin the Day of God. Re 21:1 And I saw a new heaven and a new earth: for the first heaven and the first earth were passed away; and there was no more sea.
11 Seeing then that all these things shall be dissolved, what manner of persons ought ye to be in all holy conversation and godliness,
12 Looking for and hasting unto the coming of the day of God, wherein the heavens being on fire shall be dissolved, and the elements shall melt with fervent heat?
Another way of looking at the day of God is that it is called and rightly so, the eighth day, because it is. The number 8 is used by God for "new" things.
Matt 27:62 Now the next day (saturday), that followed the day of the preparation (Friday), the chief priests and Pharisees came together unto Pilate,
63 Saying, Sir, we remember that that deceiver said, while he was yet alive, After three days I will rise again.
64 Command therefore that the sepulchre be made sure until the third day, lest his disciples come by night, and steal him away, and say unto the people, He is risen from the dead: so the last error shall be worse than the first.
65 Pilate said unto them, Ye have a watch: go your way, make [it] as sure as ye can.
66 So they went, and made the sepulchre sure, sealing the stone, and setting a watch.
28:1 In the end of the sabbath (Saturday), as it began to dawn toward the first day of the week (Sunday), came Mary Magdalene and the other Mary to see the sepulchre.
Mark 16:1 And when the sabbath was past, Mary Magdalene, and Mary the [mother] of James, and Salome, had bought sweet spices, that they might come and anoint him.
2 And very early in the morning the first day of the week, they came unto the sepulchre at the rising of the sun.
Luke 23:53 And he took it down, and wrapped it in linen, and laid it in a sepulchre that was hewn in stone, wherein never man before was laid.
54 And that day was the preparation, (Friday) and the sabbath drew on.
55 And the women also, which came with him from Galilee, followed after, and beheld the sepulchre, and how his body was laid.
56 And they returned, and prepared spices and ointments; and rested the sabbath day according to the commandment.
1 Now upon the first day of the week, (Sunday) very early in the morning, they came unto the sepulchre, bringing the spices which they had prepared, and certain [others] with them.
Jn 20:1 The first day of the week cometh Mary Magdalene early, when it was yet dark,
Joh 20:19 Then the same day at evening, being the first day of the week, when the doors were shut where the disciples were assembled for fear of the Jews, came Jesus and stood in the midst, and saith unto them, Peace [be] unto you.