"Tomorrow at five o'clock?"
Translation:Demain à cinq heures ?
French uses the plural of "heure" (hour) when telling the time (so it's like saying "at five hours"), except, of course, for "one o'clock" -> "une heure".
I put "à demain à cinq heures", because when you want to say "see you tomorrow" - you use "à demain". I am not native speaker of English, but I thought that when you want to make an arrangement with someone for tomorrow you just say "Tomorrow?" --> "à demain?". Thank you for explanation.