In, On, At et les indicateurs de temps

at on in
  • Heure
    > at 7.30
    > at 8 o’clock
    > at noon,
    > at midnight

  • Fêtes
    > at Christmas

    > at Halloween
  • Jours de la semaine
    > on Monday,
    > on Friday
  • Jours + partie de la journée
    > on Monday morning
    > on Friday night
  • Dates précises
    > on Friday 28th
    > on April 1st
    > on my birthday
  • Parties de la journée
    > in the morning
    > in the afternoon
    Mais : at night
  • Mois
    > in March
    > in September
  • Saison
    > in autumn
    > in spring
  • Années
    > in 1997
    > in 2010