Bonjour! Je vais essayer! :D
13h15 = one fifteen in the afternoon/one fifteen p.m.
17h30 = five thirty in the evening/five thirty p.m./half past five in the afternoon
03h45 = three forty five in the morning/three forty five a.m.
08h00 = eight a.m. sharp/ eight in the morning/ eight o'clock in the morning
J'espere t'avoir aide! :)