'New Moon' in the Bible

It will be the duty of the prince to provide the burnt offerings, the grain offering, and the drink offering at festivals, on the new moons and Sabbaths, at all the appointed feasts of the house of Israel; he will provide the sin offering, the grain offering, the burnt offering, and the peace offerings to make atonement for the house of Israel.

"'This is what the sovereign Lord says: The gate of the inner court that faces east will be closed six working days, but on the Sabbath day it will be opened and on the day of the new moon it will be opened.

The people of the land will bow down at the entrance of that gate before the Lord on the Sabbaths and on the new moons.

On the day of the new moon he will offer an unblemished young bull, and six lambs and a ram, all without blemish.