Joh 19:31 The Jews therefore, because it was the preparation, that the bodies should not remain upon the cross on the sabbath day, (for that sabbath day was an high day,) besought Pilate that their legs might be broken, and that they might be taken away.
which day was this?
Joh 19:30 When Jesus therefore had received the vinegar, he said, It is finished: and he bowed his head, and gave up the ghost.
Joh 20:1 The first day of the week cometh Mary Magdalene early, when it was yet dark, unto the sepulchre, and seeth the stone taken away from the sepulchre.
Joh 19:31 The Jews therefore, because it was the preparation, that the bodies should not remain upon the cross on the sabbath day, (for that sabbath day was an high day,) besought Pilate that their legs might be broken, and that they might be taken away.
Joh 19:38 And after this Joseph of Arimathaea, being a disciple of Jesus, but secretly for fear of the Jews, besought Pilate that he might take away the body of Jesus: and Pilate gave him leave. He came therefore, and took the body of Jesus.
Joh 19:39 And there came also Nicodemus, which at the first came to Jesus by night, and brought a mixture of myrrh and aloes, about an hundred pound weight.
Joh 19:40 Then took they the body of Jesus, and wound it in linen clothes with the spices, as the manner of the Jews is to bury.
Joh 19:41 Now in the place where he was crucified there was a garden; and in the garden a new sepulchre, wherein was never man yet laid.
Joh 19:42 There laid they Jesus therefore because of the Jews' preparation day; for the sepulchre was nigh at hand.
note that this "High day" happens after Jesus dies on preparation day. following this high day comes the first day which is a Sunday. this is exactly the same pattern shown in Luke.
Jesus dies:
Luk 23:46 And when Jesus had cried with a loud voice, he said, Father, into thy hands I commend my spirit: and having said thus, he gave up the ghost.
Joh 19:30 When Jesus therefore had received the vinegar, he said, It is finished: and he bowed his head, and gave up the ghost.
Body taken and berried:
Luk 23:50 And, behold, there was a man named Joseph, a counsellor; and he was a good man, and a just:
Luk 23:51 (The same had not consented to the counsel and deed of them

he was of Arimathaea, a city of the Jews: who also himself waited for the kingdom of God.
Luk 23:52 This man went unto Pilate, and begged the body of Jesus.
Luk 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.
Joh 19:38 And after this Joseph of Arimathaea, being a disciple of Jesus, but secretly for fear of the Jews, besought Pilate that he might take away the body of Jesus: and Pilate gave him leave. He came therefore, and took the body of Jesus.
Joh 19:39 And there came also Nicodemus, which at the first came to Jesus by night, and brought a mixture of myrrh and aloes, about an hundred pound weight.
Joh 19:40 Then took they the body of Jesus, and wound it in linen clothes with the spices, as the manner of the Jews is to bury.
It was preparation day before the Sabbath:
Luk 23:54 And that day was the preparation, and the sabbath drew on.
Joh 19:31 The Jews therefore, because it was the preparation, that the bodies should not remain upon the cross on the sabbath day, (for that sabbath day was an high day,) besought Pilate that their legs might be broken, and that they might be taken away.
The women come on Sunday the first day:
Luk 24:1 Now upon the first day of the week, very early in the morning, they came unto the sepulchre, bringing the spices which they had prepared, and certain others with them.
Joh 20:1 The first day of the week cometh Mary Magdalene early, when it was yet dark, unto the sepulchre, and seeth the stone taken away from the sepulchre.
The Pattern is exactly the same with some different details in each Gospel.
So this was a preparation day on which Jesus died on. same as the preparation day on which the Sabbath according to the commandment/7th day Sabbath came.
It doesn't matter how you spin this the High day is on the 7th day in this case. they are not separate days as can be seen by context. both follow the same pattern.