'New Moon' in the Bible

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

Thus saith the Lord GOD; The gate of the inner court that looketh towards 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 in the sabbaths and in the new moons.

And in 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.