Why did Mary Magdalene and the other women disciples wait until the dawn of Sunday before arriving at the tomb?

When our Lord died on the Day of Preparation (for the Sabbath) that is Friday, there was an urgency to get his body into the tomb before sunset, because at sunset the sabbath day would begin and any work would not be permitted. Why then did the women disciples not go to the tomb on Saturday at/after sunset? If the sabbath day started at sunset on Friday then it ended at the Saturday sunset. Why did they wait for the dawn on Sunday morning?