Bonjour
Il est trois heures de l'après-midi.
<em>it's three in the afternoon.</em>
<em />
<em>EXPLANATION</em>
<em>Il est vingt-trois heures = it's twenty three = in French it's eleven p.m.</em>
il est trois heures de l'après-midi = it's three in the afternoon
<em>Il est quinze heures = it's fifteen = in French it's three (p.m.) (so you don't need to say "in the afternoon")</em>
<em>it's une heure de l'après-midi = it's one in the afternoon.</em>
<em>-</em>
<em>When you say hours from treize to vingt-trois (13-> 23) you don't need to add "in the afternoon", "in the evening" ....</em>
<em>you can't say "it's quinze heures de l'après-midi"....</em>
<em>il est quinze heures = il est trois heures de l'après-midi (3 p.m.)</em>
<em>OR</em>
<em>you can't say "il est vingt-trois heures du soir"...</em>
<em>il est vingt-trois heures = il est onze heures du soir. (23 p.m.)</em>
<em>-</em>
hope this helps ☺☺☺