A Voice to the Gentile Church / February 17, 2021 / Podcast: Shouldn’t We be Observing the Biblical Sabbath? Fellowship Church · Shouldn't We be Observing the Biblical Sabbath? Why are we following the Gregorian, “man-made” calendar to determine God’s Sabbaths when the phases of the moon were set in place for us to determine the appointed times of God (appointed times including the Sabbath [Shabbat]).