an act of celebrating.

the festivities engaged in to celebrate something.

noun

anniversary , bash * , birthday , blast * , blowout * , carousal , ceremony , conviviality , festival , festivity , fete , frolic , gaiety , gala , glorification , hilarity , honoring , hoopla , hullabaloo * , jollification , joviality , jubilation , jubilee , keeping , magnification , memorialization , merriment , merrymaking , observance , party , performance , recognition , remembrance , revelry , saturnalia , solemnization , spree , triumph , wingding , commemoration , rejoicing , revel , shindig , shindy , affair , function , occasion , soiree , acclaim , acclamation , applause , commendation , compliment , encomium , eulogy , kudos , laudation , panegyric , plaudit , exultation , fiesta , jamboree , jubilance , rite