no later thanpreppreposition: Relates noun or pronoun to another element of sentence--for example, "a picture of John," "She walked from my house to yours."
(on or before, by)
不晚于 bù wǎn yú
不迟于 bù chí yú
Full payment must be received no later than two weeks before the start of the course. Rooms must be vacated no later than midday.