'New Moon' in the Bible

It shall be the prince’s responsibility to provide the burnt offerings, the grain offerings, and the drink offerings at the feasts, on the New Moons and on the Sabbaths, at all the appointed feasts of the house of Israel. He shall prepare and provide the sin offering, the grain offering, the burnt offering and the peace offerings, to make atonement for the house of Israel.”

‘Thus says the Lord God, “The gate of the inner courtyard that faces east shall be shut during the six working days, but it shall be opened on the Sabbath day and opened on the day of the New Moon.

The people of the land shall also worship 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 shall offer a young bull without blemish, also six lambs and a ram, without blemish.