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. Matthew 28:1
This man [Joseph of Arimathea] went to Pilate and asked for the body of Jesus. … It was the day of Preparation, and the sabbath was beginning. The women who had come with him from Galilee followed, and they saw the tomb and how his body was laid. Then they returned, and prepared spices and ointments. On the sabbath they rested according to the commandment.
By the Jewish calendar, the new day begins at sundown, thus the beginning of the day would have been Saturday evening. One debate over this verse is what it says about the time of the visit, & thus the resurrection. The 3 other gospels & the current Christian tradition, have the empty tomb discovered the day after Sabbath, today known as Easter Sunday. This verse actually contains 2 time indicators. The 1st can be translated as "late on Sabbath" and the 2nd as "at the beginning of the first day of the week." It literally translates as dawning of the day, but as at Luke 23:54 this term can also refer to the time at sundown as the beginning of night. Thus the verse can be read as describing the resurrection as happening on Saturday rather than Sunday.