o'clock
US /əˈklɑːk/
UK /əˈklɑːk/

1.
in punto
used after a number from one to twelve to indicate a particular hour when telling the time
:
•
It's three o'clock.
Sono le tre in punto.
•
The meeting starts at nine o'clock in the morning.
La riunione inizia alle nove in punto del mattino.