In this monograph, Hryhoriy Lozinskyy studies five feasts contained in Num 28:16-30:1. Each of them is first treated in the light of biblical calendars and other related texts. The calendar in Numbers is later than an earlier version of Leviticus 23; yet the final form of Lev 23:1-44 is also a result of some later additions that took place after Num 28:1-30:1 had been composed. The author also focuses on the history of interpretation: he examines several pseudepigrapha, the Dead Sea Scrolls, and ancient Jewish writers from 200 BCE to 100 CE. He shows how these ancient sources reworked the biblical texts by expansions, clarifications, and omissions. In sum, the calendar in Numbers employs several previous traditions that dealt with the feasts, sacrifices, and calendars in order to compose the detailed list of the offerings for the appointed times. Moreover, it is a text that has been used by many ancient sources, especially in the matter of the sacrifices.