Let's not forget the calendar has been changed since the Resurrection. For example, George Washington was really born on February 12th, by the calendar in effect at the time. Since the most recent change, his birthday is considered to be February 22nd. If I remember my Bible correctly, Jesus was crucified on the Sabbath, a Friday. Thus the third day was Sunday. This is the basis for the Christian Sabbath being Sunday, and not sundown Friday till sundown Saturday. The Seventh Day Adventisits still observe the Jewish Sabbath, though they are Christians. To each his own.