VERB + FESTIVALLY
spend
FESTIVALLY + NOUN
abundance, things
PREP.
out, with
adj
Resembling or characteristic of a festival.
So you're much more part of the community if you go out and do festivally things.
adv
In a festive manner.
These three days of Byram they spend festivally, rejoicing with abundance of illuminations all night, shooting of guns, and fireworks flying in the air; for they reckon that all their sins are now done away, […]
So you're much more part of the community if you go out and do festivally things.
WiktionaryThese three days of Byram they spend festivally, rejoicing with abundance of illuminations all night, shooting of guns, and fireworks flying in the air; for they reckon that all their sins are now don
Wiktionaryi Register
In some senses, festivally is marked as informal, obsolete, rare. Watch for register when choosing this word.