1) They turned up here in the early hours.
(Apareceram aqui de madrugada.) 2) They were getting up in the early hours.
(Estavam levantando de madrugada.) 3) We used to go to bed in the early hours.
(A gente costumava ir dormir de madrugada.) 4) My friend called me in the early hours.
(Meu amigo me ligou de madrugada.)
Cambridge dictionary: Wee hours: the early hours of the morning, between twelve o'clock at night and the time when the sun rises.
- After leaving the club in the wee hours of the morning to work at a local cafe, Victoria runs into a pack of young men, who seem intent on wooing her. (The Guardian) - He was up until the wee hours trying to finish his work. (Cambridge dictionary)