Fast of the Firstborn tends to precipitate contrition in the one who fasts (see Joel, 2:12–18). This is why the Bible requires fasting (lit. self-affliction) on Yom Kippur (Jewish holiday of atonement) (see Leviticus, 23:27,29,32; Numbers, 29:7; Tractate "Yoma", 8:1; ibid. Babylonian Talmud, 81a). Because, according to the Hebrew Bible, hardship and calamitous circumstances can occur as a result of wrongdoing (see, for example, Leviticus 26:14–41), fasting is often undertaken by the community or by individuals to achieve atonement and avert catastrophe (see, for example, Esther 4:3,16; Jonah 3:7). Most of the Talmud's Tractate "Ta'anit" ("Fast[s]") is dedicated to the protocol involved in declaring
Feast of the First Fruits of Wine day because "the wine gets atonement on this day" and was commanded to be observed as an annual celebration perpetually. After this holiday, the children of Israel were permitted to eat from their grape vines, whether the grapes were ripe or still unripe, because after the observances of this holiday, they had made a full atonement for the wine. It so happens that this day coincides with the modern Jewish period called "The Nine Days", a time when mourning practices take place and when wine and meat are prohibited. This holiday is not observed by any known modern Jewish group