'Festival day' in the Bible

They celebrated the Festival of Booths as prescribed, and offered burnt offerings each day, based on the number specified by ordinance for each festival day.

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

ת TavYou summoned my attackers on every side,as if for an appointed festival day;on the day of the Lord’s angerno one escaped or survived.My enemy has destroyedthose I nurtured and reared.

"On the king's festival day the princes got drunk from wine, so the king joined the mockers.

What will you do on a festival day,on the day of the Lord’s feast?

But they said, "Not on the Festival-day, for fear there should be a riot among the people."