Expositor's Bible Commentary Commentary Matthew 28:1

"Now late on the sabbath day, 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 (ASV)

“After the Sabbath” is a general time indicator; i.e., the women would not walk far during the Sabbath; so they waited until after the Sabbath. But by then Saturday night was drawing on; so early on the first day of the week they “went to look at the tomb.”