at three o’clock
See you at three.
Call her at three.
Estaremos de vuelta a las tres y media.
We'll be back at 3:30.
Would three o’clock work?
No olvides cerrar bien a las tres.
Don't forget to lock up properly at three o'clock.
— Yojimbo (1961)
Por favor, está en casa a las tres.
Please be home at three.
Te encuentro mañana a las tres.
I'll meet you tomorrow at three.