at three in the morning
A las tres de la mañana, él se levantó de la cama para meter frases en Tatoeba.
At three in the morning, he got out of bed to enter sentences on Tatoeba.
Los clientes entran a las tres de la mañana a comprar carne.
Customers come in at three in the morning to buy meat.
— Ángeles caídos (1995)
Not at three in the morning.