Les prépositions in, on, at (temps et lieu)

in 2020, on Monday, at 5 o'clock ; in Paris, on the table, at home.

Préposition	Emploi	Exemples
at	heure précise, moments fixes	at 5 o'clock, at noon, at night, at the weekend (UK)
on	jours et dates	on Monday, on 3 May, on my birthday
in	mois, années, saisons, parties de la journée	in May, in 2020, in summer, in the morning

Préposition	Emploi	Exemples
in	à l'intérieur, villes, pays	in the box, in Paris, in France
on	sur une surface	on the table, on the wall, on the second floor
at	un point, un lieu d'activité	at home, at work, at school, at the station

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