festivity

1. N-UNCOUNT Festivity is the celebration of something in a happy way. 欢庆

There was a general air of festivity and abandon. 那里弥漫着纵情欢庆的气氛。

2. N-COUNT Festivities are events that are organized in order to celebrate something. 庆典

The festivities included a huge display of fireworks. 庆典包括大规模的烟花燃放。