'Year' in the Bible

“This month shall be the beginning of months to you; it is to be the first month of the year to you.

Your lamb or young goat shall be [perfect] without blemish or bodily defect, a male a year old; you may take it from the sheep or from the goats.

Therefore, you shall keep this ordinance at this time from year to year.

but the seventh year you shall let it rest and lie uncultivated, so that the poor among your people may eat [what the land grows naturally]; whatever they leave the animals of the field may eat. You shall do the same with your vineyard and olive grove.

“Three times a year you shall celebrate a feast [dedicated] to Me.

Also [you shall observe] the Feast of Harvest (Weeks, Pentecost, or First Fruits), acknowledging the first fruits of your labor, of what you sow in the field. And [third] the Feast of Ingathering (Booths or Tabernacles) at the end of the year when you gather in [the fruit of] your labors from the field.

Three times a year all your males shall appear before the Lord God.

I will not drive them out before you in a single year, so that the land does not become desolate [due to lack of attention] and the [wild] animals of the field do not become too numerous for you.

“Now this is what you shall offer on the altar: two one year old lambs shall be offered each day, continuously.

Once a year Aaron shall make atonement [for sin] on its horns. He shall make atonement on it with the blood of the sin offering of atonement once a year throughout your generations. It is most holy to the Lord.”

Three times a year all your males shall appear before the Lord God, the God of Israel.

For I will drive out and dispossess nations before you and enlarge your borders; nor shall any man covet (actively seek for himself) your land when you go up to appear before the Lord your God three times a year.

Now it happened on the first day of the first month (Abib) in the second year [after the exodus from Egypt], that the tabernacle was erected.