nuptials

When you go to someone's wedding, you are attending their nuptials, a fancier way of talking about a wedding ceremony.

If you take away the "s" in nuptials, it is used like an adjective to mean "related to marriage." You could say that your newlywed friends are living in nuptial bliss, or if you like them less, that their wedding, with fireworks and a horse-drawn carriage, was a perfect example of nuptial excess.

Definitions of nuptials
1

n the social event at which the ceremony of marriage is performed

Synonyms:
hymeneals, wedding, wedding ceremony
Type of:
ceremonial, ceremonial occasion, ceremony, observance
a formal event performed on a special occasion