Anniversaries
centenary
bicentenary
birthday
tercentenary
quartercentenary
ruby anniversary
silver wedding
jubilee
wedding anniversary

Verbs relating to celebration
push the boat out
inaugurate
mark
raise your glass
see in the New Year
see out the Old Year

Items you might bring to a celebration
confetti
champagne
present

Events and types of celebration
bash
blowout
extravaganza
jamboree
party
hen night
stag night
homecoming
parade
bonfire
dinner