Il est trois heures et quart de l'après-midi.

Pronunciation: eel eh trwah zuhr eh kar duh lah-preh-mee-dee

Meaning: It is 3:15 in the afternoon.

In French, you use "et quart" (and a quarter) for times at 15 minutes past the hour, and always remember to specify "de l'après-midi" (in the afternoon) or "du matin" (in the morning) since French uses 24-hour time less frequently in everyday speech.