Notes
Prepositions of Time: in, at, on
We use the prepositions in, at, and on to talk about time. Each one is used in different situations.
prep.
in
in
prep.
at
at
prep.
on
on
Preposition
Use with...
Examples
in
Months, Years, Seasons, Parts of the day
in January, in 2025, in summer, in the morning, in the afternoon
on
Days, Dates
on Monday, on August 18
at
Clock times, Noon, Midnight, Holidays (some cases)
at 7:00, at noon, at midnight, at Christmas
in
prep.
in
in
Use 'in' for months, years, seasons, the morning, and the afternoon.
Use 'in' with...
Example
Months
in January
in May
Years
in 2025
in 1999
Seasons
in spring
in summer
in fall
in winter
the morning
in the morning
the afternoon
in the afternoon
My birthday is in May.
We go on vacation in summer.
on
prep.
on
on
Use 'on' for days and dates.
Use 'on' with...
Example
Days
on Monday
on Friday
Dates
on August 18
on January 1st
The meeting is on Monday.
My party is on August 18th.
at
prep.
at
at
Use 'at' for specific times.
Use 'at' with...
Example
Clock times
at 7:00
Noon
at noon
Midnight
at midnight
Holidays (some cases)
at Christmas
at Easter
The bus leaves at 7:00.
We eat lunch at noon.
Video: Prepositions of Time
prepositions of time