
In the seventh month, on the tenth day of the month, you shall afflict your souls, and you shall not do any work . . . For on that day he shall provide atonement for you to cleanse you from all your sins before the LORD. (Leviticus 16:29-30)
The Hebrew Bible actually records three festivals in ancient Israel during the autumnal harvest month of Tishri: New Year (Rosh ha-Shana) starting on the 1st of Tishri, the Day of Atonement (Yom Kippur) starting on the 10th, and Tabernacles (Sukkot) starting on the 15th (cf. Num 29 and Lev 23). However, this tri-fold division of the festival complex is generally seen as a post-exilic redaction, the consensus being that anciently there was a single yearly autumnal agrarian ingathering festival that was later divided into the three distinct feasts.[1] This is seen as happening in stages. In the time of King Josiah, the deuteronomist reformers deemphasized the land atonement and land fertility aspects of the fall festival (as well as its local nature) in order to create a national festival at the Jerusalem Temple.[2] Later, due to the exile, the solar-based harvest calendar is abandoned in favor of a Babylonian lunar system of chronology that required fixing rituals to precise calculations of new moons rather than on a fluctuating harvest season.[3] Many of the names used for months in Israel's calendar, including Tishri itself, are actually of Babylonian origin; very few of the original Hebrew names for the months are actually known, further evidence of the editing that took place due to Babylonian influence.





