ceremonial

nouns

a formal event performed on a special occasion

"a ceremony commemorating Pearl Harbor"

marked by pomp or ceremony or formality

"a ceremonial occasion"; "ceremonial garb"

ceremonial

is derived from

is derived from

is derived from

is similar to

being in accord with established forms and conventions and requirements (as e.g. of formal dress)

"pay one's formal respects"; "formal dress"; "a formal ball"; "the requirement was only formal and often ignored"; "a formal education"