midnight 
英 [ˈmɪdˌnaɪt]  美 [ˈmɪdˌnaɪt] 
n. 子夜，午夜

adj. 子夜的，午夜的

例句：
It was well after midnight by the time Anne returned to her apartment. 

安妮回到寓所的时候早就过了午夜。

The entrance gates were locked at midnight. 

大门在夜里12点钟上锁。

It is totally out of the question to postpone the midnight deadline. 

想要推迟午夜的最后期限是完全不可能的。

I'm taking the midnight train south. 

我准备坐午夜的火车南下。