The party is on Friday evening.

　　聚會定于周五晚上舉行。

　　He wore formal evening dress.

　　他穿了正式的晚禮服。

　　Everyone was in evening dress.

　　人人都身著晚禮服。

　　What are you doing this evening?

　　你今晚打算做什么？

　　Is there a surgery this evening?

　　今晚有沒有醫(yī)生應診？