Leviticus 23:34-36

VIN(i) 34 Say to the children of Israel, On the fifteenth day of this seventh month let the feast of tents be kept to the Lord for seven days. 35 On the first day shall be a holy assembly: you shall do no regular work. 36 For seven days you must present an offering made by fire to the LORD. On the eighth day it shall be a holy assembly for you, and you shall present an offering made by fire to the LORD; it is a celebration; you must not do any regular work.
Reformed Dating