early hours
noun [ plural ] uk/ˈɜː.li ˌaʊəz/ us/ˈɝː.li ˌaʊrz/
凌晨;一大早
the early hours of the morning, between twelve o'clock at night and the time when the sun rises
We sat up talking until the early hours. 我们坐在那里一直聊到凌晨。
Synonym: small hours