Il est dix heures et demie. It is really common for French speakers to use the 24-hour clock.‎ So 8pm is…. Il est vingt heures. Il est vingt heures vingt. Il est vingt heures trente.

This decimal clock was made by Pierre Daniel Destigny in Rouen, France, between 1798 and 1805. | DeFacto, Wikimedia Commons // CC BY-SA 4.0 Everybody knows that there are 24 hours in a day ...