To say ’10 o’clock’ in Spanish, you would say ‘10 en punto‘. If you want to be more specific, you can say ‘Son las diez‘ which translates to ‘It is ten o’clock’.
In Spanish, time is typically expressed in hours using the structure ‘Son las’ followed by the hour. When you want to emphasize that it is exactly on the hour, you can add ‘en punto’ at the end. For example, ‘Son las diez en punto’ clearly indicates it is exactly 10:00.