translate English to French: "Today" refers to the time period 6 am to p.m., "tonight" refers to the time period 6 p.m. to 6 am, and tomorrow refers to the time period 6 a.m. to midnight the following day.
«Aujourd'hui» désigne la période allant de 6 à 18 heures, «ce soir» de 18 à 6 heures et «demain» de 6 heures à minuit le lendemain.