Grammar UsageWhen To Use IN, ON, and AT

TIME - PLACE - IN

Months

▪ In January
▪ In October
Seasons
▪ In the summer
▪ In the spring
Years
▪ In 2004
▪ In 1986
Periods of the day
▪ In the morning
▪ In the evening
(exception: at night)

Cities and countries
▪ In Tokyo
▪ In Japan
Rooms and buildings
▪ In the kitchen
▪ In the supermarket
Closed spaces
▪ In the car
▪ In a park
 
TIME - PLACE  -ON

Dates and days
▪ On Monday
▪ On February 14th

Transportation
▪ On the bus
▪ On a bike
(exception: in a car)
 
A surface
▪ On the table
▪ On the wall

TIME - PLACE - AT

Times

▪ At 6:00
▪ At half past three
▪ At noon
Contexts

▪ At school
▪ At work
▪ At a party