A special anniversary (or the celebration of it).

Roget 138: periodicity, intermittence; beat; oscillation etc. 314; pulse, pulsation; rhythm; alternation, alternateness, alternativeness, alternity^†.    bout, round, revolution, rotation, turn, say.    anniversary, jubilee, centenary.    catamenia^†, courses, menses, menstrual flux.    [Regularity of return] rota, cycle, period, stated time, routine; days of the week; Sunday, Monday &c.; months of the year; January &c.; feast, fast &c.; Christmas, Easter, New Year's day &c.; Allhallows^†, Allhallowmas^†, All Saints' Day; All Souls', All Souls' Day; Ash Wednesday, bicentennial, birthday, bissextile^†, Candlemas^†, Dewali, groundhog day [U.S.], Halloween, Hallowmas^†, Lady day, leap year, Midsummer day, Muharram, woodchuck day [U.S.], St.    Swithin's day, natal day; yearbook; yuletide.    punctuality, regularity, steadiness.    ... show more

Roget 838: rejoicing, exultation, triumph, jubilation, heyday, flush, revelling; merrymaking etc. (amusement) 840; jubilee etc. (celebration) 883; paean, Te Deum etc. (thanksgiving) 990 [Lat.]; congratulation etc. 896.    smile, simper, smirk, grin; broad grin, sardonic grin.    laughter (amusement) 840.    risibility; derision etc. 856.    Momus; Democritus the Abderite^†; rollicker^†.    ... show more

Roget 840: amusement, entertainment, recreation, fun, game, fun and games; diversion, divertissement; reaction, solace; pastime, passetemps [Fr.], sport; labor of love; pleasure etc. 827.    relaxation; leisure etc. 685.    fun, frolic, merriment, jollity; joviality, jovialness^†; heyday; laughter etc. 838; jocosity, jocoseness^†; drollery, buffoonery, tomfoolery; mummery, pleasantry; wit etc. 842; quip, quirk.    [verbal expressions of amusement: list] giggle, titter, snigger, snicker, crow, cheer, chuckle, shout; horse laugh, belly laugh, hearty laugh; guffaw; burst of laughter, fit of laughter, shout of laughter, roar of laughter, peal of laughter; cachinnation^†; Kentish fire; tiger.    play; game, game at romps; gambol, romp, prank, antic, rig, lark, spree, skylarking, vagary, monkey trick, gambade, fredaine^†, escapade, echappee [Fr.], bout, espieglerie [Fr.]; practical joke etc. (ridicule) 856.    dance; hop, reel, rigadoon^†, saraband^†, hornpipe, bolero, ballroom dance; [ballroom dances: list], minuet, waltz, polka, fox trot, tango, samba, rhumba, twist, stroll, hustle, cha-cha; fandango, cancan; bayadere^†; breakdown, cake-walk, cornwallis [U.S.], break dancing; nautch-girl; shindig [U.S.]; skirtdance^†, stag dance, Virginia reel, square dance; galop^†, galopade^†; jig, Irish jig, fling, strathspey^†; allemande [Fr.]; gavot^†, gavotte, tarantella; mazurka, morisco^†, morris dance; quadrille; country dance, folk dance; cotillon, Sir Roger de Coverley; ballet etc. (drama) 599; ball; bal, bal masque, bal costume; masquerade; Terpsichore.    festivity, merrymaking; party etc. (social gathering) 892; blowout [U.S.], hullabaloo, hoedown, bat [U.S.], bum [U.S.], bust [Slang], clambake [U.S.], donation party [U.S.], fish fry [U.S.], jamboree [Slang], kantikoy^†, nautch^†, randy, squantum [U.S.], tear [Slang], Turnerfest^†, yule log; fete, festival, gala, ridotto^†; revels, revelry, reveling; carnival, brawl, saturnalia, high jinks; feast, banquet etc. (food) 298; regale, symposium, wassail; carouse, carousal; jollification, junket, wake, Irish wake, picnic, fete champetre [Fr.], regatta, field day; treat.    round of pleasures, dissipation, a short life and a merry one, racketing, holiday making.    rejoicing etc. 838; jubilee etc. (celebration) 883.    bonfire, fireworks, feu-de-joie, firecracker.    holiday; gala day, red letter day, play day; high days and holidays; high holiday, Bank holiday; May day, Derby day; Saint Monday, Easter Monday, Whit Monday; Bairam^†; wayz-goos^†, bean feast; Arbor Day, Declaration Day, Independence Day, Labor Day, Memorial Day, Thanksgiving Day; Mardi gras [Fr.], mi-careme [Fr.], feria [Lat.], fiesta.    place of amusement, theater; hall, concert room, ballroom, assemblyroom^†; music hall.    park, plaisance^†; national park, national forest, state park, county park, city park, vest-pocket park, public park (public) 737.1; arbor; garden etc. (horticulture) 371; pleasure ground, playground, cricketground, croquet ground, archery ground, hunting ground; tennis court, racket court; bowling alley, green alley; croquet lawn, rink, glaciarum^†, skating rink; roundabout, merry-go-round; swing; montagne Russe [Fr.].    game of chance, game of skill.    athletic sports, gymnastics; archery, rifle shooting; tournament, pugilism etc. (contention) 720; sports etc. 622; horse racing, the turf; aquatics etc. 267; skating, sliding; cricket, tennis, lawn tennis; hockey, football, baseball, soccer, ice hockey, basketball; rackets, fives, trap bat and ball, battledore and shuttlecock, la grace; pall-mall, tipcat^†, croquet, golf, curling, pallone^†, polo, water polo; tent pegging; tilting at the ring, quintain [Mediev.]; greasy pole; quoits, horseshoes, discus; rounders, lacrosse; tobogganing, water polo; knurr and spell^†.    [childrens' games] leapfrog, hop skip and jump; mother may I; French and English, tug of war; blindman's bluff, hunt the slopper^†, hide and seek, kiss in the ring; snapdragon; cross questions and crooked answers.   ; crisscross, hopscotch; jacks, jackstones^†, marbles; mumblety-peg, mumble-the-peg, pushball, shinney, shinny, tag &c.; billiards, pool, pingpong, pyramids, bagatelle; bowls, skittles, ninepins, kain^†, American bowls^†; tenpins [U.S.], tivoli.    cards, card games; whist, rubber; round game; loo, cribbage, besique^†, euchre, drole^†, ecarte [Fr.], picquet^†, allfours^†, quadrille, omber, reverse, Pope Joan, commit; boston, boaston^†; blackjack, twenty-one, vingtun [Fr.]; quinze [Fr.], thirty-one, put, speculation, connections, brag, cassino^†, lottery, commerce, snip-snap-snoren^†, lift smoke, blind hookey, Polish bank, Earl of Coventry, Napoleon, patience, pairs; banker; blind poker, draw poker, straight poker, stud poker; bluff, bridge, bridge whist; lotto, monte, three-card monte, nap, penny-ante, poker, reversis^†, squeezers, old maid, fright, beggar-my-neighbor; baccarat.    [cards: list] ace, king, queen, knave, jack, ten, nine, eight, seven, six, five, four, trey, deuce; joker; trump, wild card.    [card suits: list] spades, hearts, clubs, diamonds; major suit, minor suit.    bower; right bower, left bower; dummy; jackpot; deck.    [hands at poker: list] pair, two pair, three of a kind, straight, flush, full-house, four of a kind, royal flush; misere &c.. [board games: list] chess, draughts, checkers, checquers, backgammon, dominos, merelles^†, nine men's morris, go bang, solitaire; game of fox and goose; monopoly; loto &c.; [word games: list], scrabble, scribbage, boggle, crossword puzzle, hangman.    morra^†; gambling etc. (chance) 621.    toy, plaything, bauble; doll etc. (puppet ) 554; teetotum^†; knickknack etc. (trifle) 643; magic lantern etc. (show) 448; peep show, puppet show, raree show, gallanty show^†; toy shop; quips and cranks and wanton wiles, nods and becks quips and cranks and wanton wiles, nods and becks and wreathed smiles" [Milton]. entertainer, showman, showgirl; dancer, tap dancer, song-and-dance man; vaudeville act; singer; musician etc. 416.    sportsman, gamester, reveler; master of ceremonies, master of revels; pompom girl^†; arbiter elegantiarum [Lat.]; arbiter bibendi [Lat.], archer, fan [U.S.], toxophilite^†, turfman^†.    ... show more

Roget 883: celebration, solemnization, jubilee, commemoration, ovation, paean, triumph, jubilation, ceremony (rite) 998; holiday, fiesta, zarabanda^†, revelry, feast (amusement) 840; china anniversary, diamond anniversary, golden anniversary, silver anniversary, tin anniversary, china jubilee, diamond jubilee, golden jubilee, silver jubilee, tin jubilee, china wedding, diamond wedding, golden wedding, silver wedding, tin wedding.    triumphal arch, bonfire, salute; salvo, salvo of artillery; feu de joie [Fr.], flourish of trumpets, fanfare, colors flying, illuminations.    inauguration, installation, presentation; coronation; Lord Mayor's show; harvest-home, red-letter day; trophy etc. 733; Te Deum etc. (thanksgiving) 990 [Lat.]; fete etc. 882; holiday etc. 840; Forefathers' Day [U.S.].    ... show more

Dutch: ambtsjubileum, jubelfeest, jubelfeestje, jubeljaar, jubileum
Polish: jubileusz