'New Moon' in the Bible

And it shall be the prince's part to give burnt offerings, and grain offerings, and drink offerings, in the feasts, and in the new moons, and in the sabbaths, in all appointed feasts of the house of Israel: he shall prepare the sin offering, and the grain offering, and the burnt offering, and the peace offerings, to make reconciliation for the house of Israel.

Thus says the Lord GOD; The gate of the inner court that faces the east shall be shut the six working days; but on the sabbath it shall be opened, and in the day of the new moon it shall be opened.

Likewise the people of the land shall worship at the door of this gate before the LORD on the sabbaths and on the new moons.

And on the day of the new moon it shall be a young bullock without blemish, and six lambs, and a ram: they shall be without blemish.