'Festival' in the Bible

These things I remember and I pour out my soul within me.For I used to go along with the throng and lead them in procession to the house of God,With the voice of joy and thanksgiving, a multitude keeping festival.

Blow the ram's horn when there is a New Moon, when there is a full moon, on our festival day,

For observing the festival is a requirement for Israel; it is an ordinance given by the God of Jacob.

The Lord is God and has given us light.Bind the festival sacrifice with cordsto the horns of the altar.