When you tell the time in French you don’t say 'o’clock' you say how many ‎hours it is. The word for hours is les heures. ‎ Et maintenant… now … Il est ...

The "o" in "o'clock" is actually a contraction of the phrase "of the clock." Historically, when clocks were a relatively new invention, people would specify the time by saying it was "3 of the ...