IN

Use 'in' months and years and periods of time:

• in January
• in 1978
• in the twenties

Use 'in' a period of time in the future:

• in a few weeks
• in a couple of days

AT

Use 'at' with precise time:

• at six o'clock
• at 10.30
• at two p.m.

ON

Use 'on' with days of the week:

• on Monday
• on Fridays

Use 'on' with specific calendar days:

• on Christmas day
• on October 22nd

Notes to remember

in the morning / afternoon / evening - at night

We say in the morning, afternoon or evening BUT we say 'at night'

IN

Use 'in' with spaces:

• in a room / in a building
• in a garden / in a park

Use 'in' with bodies of water:

• in the water
• in the sea
• in a river

Use 'in' with lines:

• in a row / in a line
• in a queue

How to use IN ON AT in expressions of time