Ceremonious

Adjective

1. According to the required or usual ceremonies, formalities, or rituals; specifically , to ceremonial laws in the Bible.
2. Involving much ceremony; ostentatious, showy.
3. Of a person: fond of ceremony or ritual, or of observing strict etiquette or formality; punctilious.
4. Synonym of ceremonial (“of, relating to, consisting of, or used in a ceremony or rite”); formal, ritual.