'Festival' in the Bible

On the fifteenth day of this month there will be a festival; unleavened bread is to be eaten for seven days.

“On the day of firstfruits, you are to hold a sacred assembly when you present an offering of new grain to the Lord at your Festival of Weeks; you are not to do any daily work.

“You are to hold a sacred assembly on the fifteenth day of the seventh month; you must not do any daily work. You are to celebrate a seven-day festival for the Lord.

"Present these to the LORD at your appointed festival, in addition to your offerings in fulfillment of vows, free will offerings, burnt offerings, grain offerings, drink offerings, and peace offerings."