February 19, 2023.
Until recently, there were no Hebrew words for the days of the week but one. Sabbath means Saturday. All other days were derived from there: “two days after Shabbat we will go to school” meant academics on Monday. “Three days before Shabbat we will go shopping” is “mall on Wednesday." So, when G-d said on Mount Sinai to Moses to keep the sabbath? He meant Saturday. You can have a church service any day of the week but rest and communion start Friday sundown for 25 hours.