at midnight
We close at midnight.
Por que estás a beber café à meia-noite?
Why are you drinking coffee at midnight?
Tom chegou à meia-noite.
Tom arrived at midnight.
At midnight everyone went inside.
Tem sido assim, eu terei sorte se conseguir chegar em casa à meia-noite.
That's how it's been; I'll be lucky if I manage to get home by midnight.
— O Gângster (2007)
Por que estás bebendo café à meia-noite?
Why are you drinking coffee at midnight?
Tom acordou à meia-noite.
Tom woke up at midnight.
Chegamos em casa à meia-noite.
We arrived home at midnight.