This document discusses the origin of the seven-day week and whether Saturday is still considered the biblical Sabbath day. It notes that the seven-day week originated from God's commandment to observe the seventh day as the Sabbath and was preserved by Jews even as other cultures lost track of it. While the Julian calendar accumulated an error over time, the Gregorian calendar correction in 1582 did not alter the weekly cycle, as confirmed by modern observatories. Therefore, Saturday remains the same seventh day of the week referred to in scripture and by those who have observed the Sabbath for millennia.