'Feast days' in the Bible

Also, when ye be merry in your feast days and in the first days of your months, ye shall blow the trumpets over your burnt sacrifices and peaceofferings, that it may be a remembrance of you before your God. I am the LORD your God."

Afterward, the daily burnt offering also, and of the new moons and of all the feast days of the LORD that were hallowed, and all manner of freewill offerings, which they did of their own freewill unto the LORD.

namely to the shewbread, to the daily meat offering, to the daily burnt offering of the Sabbaths, of the new moons and feast days, and to the things that were sanctified, and to the sin offerings, to reconcile Israel withal, and to all the business in the house of our God.

Upon the solemn and high feast days, this shall be the meat offering: an Ephah to a bullock and an Ephah to a ram, and to the lambs: as many as he will, but ever a Hin of oil to an Ephah.

Yet am I the LORD thy God, even as when I brought thee out of the land of Egypt, and set thee in thy tents, and as in the high feast days.