How to Use Prepositions of Time and Date in English

If you're an English language learner, it's important that you learn how to use prepositions of time and date. The following explanations for each of the most important prepositions of time and date include examples to provide context.

"In" for Months, Years, Decades, and Seasons

Use the preposition "in" for specific months, years, and periods of time such as the seasons:

Sarah was born in January.
Her aunt was born in 1978.
Her great-grandmother was born in the 1920s.
I like to go skiing in winter.

The preposition "in" may also be used to refer to a period of time in the future:

My mother will be on vacation in a few weeks.
I am going to see my best friend in a couple of days.

The phrase "in time" refers to having enough time to do something:

We arrived in time for the movie.
My friend Thomas finished the report in time for the conference.

"At" for Specific Times

The preposition "at" is used to refer to a precise time:

The movie starts at six o'clock.
My father goes to bed at 10:30.
My last class ends at two p.m.

"At" is also used to refer to a period of time during the year such as special festivals:

I love the atmosphere at Cherry Blossom time.
People tend to become more hopeful at the start of spring.

"On" for Specific Days

The preposition "on" is used to refer to the days of the week:

On Monday, I am taking my dog for a run.
On Fridays, I get my hair done.

The preposition "on" may be used with specific calendar days as well:

On Christmas Day, my family goes to church.
On October 22nd, I am going to buy a new television.

The phrase "on time" refers to being at a location or completing a task by an expected time:

Make sure you come to work on time tomorrow.
I managed to finish the report on time.

"By" with Times

The preposition "by" is used to express that something happens before the time expressed:

I will finish work by seven o'clock.
The director will have made his decision by the end of next week.

"In the Morning" / "Afternoon / "Evening" versus "At Night"

While English speakers say "in the morning," "in the afternoon," or "in the evening," they do not say "in the night." Instead, they say "at night." It may not make sense, but it's an important rule to remember:

Our daughter usually does yoga in the morning.
I don't like to go out at night.
We used to play tennis in the afternoon.

"Before" / "After"

Use the prepositions "before" and "after" to state that something happens either before or after a specific time. You can use "before" and "after" with specific times, days, years, or months: