The new moons were seasons of peculiar solemnity in the Jewish church, and seem to have been held in almost equal veneration with the sabbath. See 2 Kings 4:23. But it hath not pleased the HOLY GHOST to give his gospel church so particular an account of the cause of their institution. There can be but little question that they had an eye to JESUS, to whom all ordinances pointed. And by comparing the thing itself with what is said of the solemnity of the worship observed in the season of the new moon, by the prophet Isaiah, a light seems to be thrown upon the subject, as if the ceremonies in them had an eye to the spiritual worship in the church of the LORD JESUS. There it is said, that from one new moon to another, and from one sabbath to another, shall all flesh come to worship before JEHOVAH. See Isaiah 66:23. And I venture to observe, upon this passage, that the Hebrew will admit of this translation of it, from new moon to His new moon, and from sabbath to His sabbath: as if JESUS, who is the well known and allowed LORD of the sabbath, was particularly referred to. Matthew 12:8.
Numbers 28:11-15
11 And in the beginnings of your months ye shall offer a burnt offering unto the LORD; two young bullocks, and one ram, seven lambs of the first year without spot;
12 And three tenth deals of flour for a meat offering, mingled with oil, for one bullock; and two tenth deals of flour for a meat offering, mingled with oil, for one ram;
13 And a several tenth deal of flour mingled with oil for a meat offering unto one lamb; for a burnt offering of a sweet savour, a sacrifice made by fire unto the LORD.
14 And their drink offerings shall be half an hin of wine unto a bullock, and the third part of an hin unto a ram, and a fourth part of an hin unto a lamb: this is the burnt offering of every month throughout the months of the year.
15 And one kid of the goats for a sin offering unto the LORD shall be offered, beside the continual burnt offering, and his drink offering.