Prepositions of Time (at- in – on)

Prepositions can also be used to show when something happened.

The prepositions at, on, and in

We use at for specific times.

For example:

• I start work at 7.00 a.m.
• I don't work at night.

We use on for specific days and dates.

For example:

• My birthday is on Monday.
• We're having a party on 7th September.

We also use on for some special days.

For example:

• On Christmas day.

We use in for nonspecific times during a day, a month, a season, or a year.

For example:

• In summer it's too hot to work.
• I started this web site in 1999.
• She woke up in the night.

More prepositions of time