festivity
/fesˈtɪvətɪ/noun
(pl. -ies)［mass noun］
1- the celebration of something in a joyful and exuberant way欢庆：
the jolly festivity of the Last Night of the Proms.
伦敦逍遥音乐会最后一晚的欢乐气氛。
1.1
festivities
activities or events celebrating a special occasion庆典; 庆祝活动。
词源
late Middle English: from Old French festivite or Latin festivitas, from festivus 'festive', from festum, (plural) festa 'feast'.