ceremonial

adj. ritual, formal, stately, official

n. ceremony, custom, ritual

A ceremony is an activity, infused with ritual significance, performed on a special occasion.
See more at Wikipedia.org...

Noun
1. a formal event performed on a special occasion; "a ceremony commemorating Pearl Harbor"
(synonym) ceremony, ceremonial occasion, observance
(hypernym) affair, occasion, social occasion, function, social function
(hyponym) circumstance
Adjective
1. marked by pomp or ceremony or formality; "a ceremonial occasion"; "ceremonial garb"
(similar) formal

n. ceremonial, ceremony

adj. ceremonial, ritualistic

n. ceremonial