'New moon' in the Bible

And so David hid himself in the field. And when the new moon was come, the king sat him down at meat, for to eat.

And he said, "Wherefore wilt thou go to him today, while it is neither new moon nor Sabbath day?" And she said, "Be content."

that I may build a house for the name of the LORD my God, to consecrate it to him to burn sweet odours and to set shewbread before him perpetually, and for burnt sacrifices morning and evening, and on the Sabbath days, and the first day of every new moon, and in the solemn feasts of the LORD our God, so to continue ever in Israel.

Blow up the trumpets in the new moon, upon our solemn feast day.

Thus sayeth the LORD God: the door of the innermore court toward the East shall be shut the six working days: but in the Sabbath and in the day of the new Moon, it shall be opened.

Let no man therefore trouble your consciences about meat and drink: or for a piece of a holy day, as the holy day of the new moon, or of the Sabbath day: