bedtime

bedtime
n [U] time for going to bed 就寝时间
    His bedtime is eight o'clock. 他的就寝时间是八点钟.
    It's long past your bedtime. 你的就寝时间早就过了.
    [attrib 作定语]
a bedtime story, ie one read to a child at bedtime 睡前故事（给孩子临睡前讲的故事）.

牛津英汉双解词典