A preposition of time refers to indicate a specific time period, whereas a preposition of place refers to a place or space where something or someone is. The most popular words used in these two types of prepositions are in, on, and also at. But now let’s focus on the preposition of time and see how to use it properly!

1. “In” Preposition of Time

In the preposition of time, the word "In" can be used to add information. You can use the preposition of time "in" for:

●      Month, for example in December.

●      Year, for example in 1998.

●      Season, for example in winter.

●      Part of the day, for example in the evening.

●      Century, for example in the 19th century.

●      Decade, for example in the 2000s.

●      Expresses a period of time, for example in four weeks.

●      Long periods, for example in the past/future.

“In” Preposition of Time Examples:

●      I’m going to Bali in May.

●      I will be available to work in July.

●      My husband likes to get up early and exercise in the morning.

2. “On” Preposition of Time

As “On” is more specific, you can use the preposition of time "on" for:

●      Days, for example on Monday, on the weekend, on the weekday.

●      Dates, for example on 9 December.

●      Days with part of the day, for example on Friday morning.

●      Feast Days. for example on Independence Day, on my birthday, on New Year’s Eve.

●      Action that is in progress at a specific time, for example on my way.

“On” Preposition of Time Examples:

●      I can’t wait to meet my parents on Tuesday.

●      See you on my birthday tonight!

●      Will you go back to your hometown on Eid?

3. “At” Preposition of Time

You can use the preposition of time “at” for:

●      Time of the day, for example at 5 o’clock.

●      A particular time, for example at night, at sunset.

For parts of the day related to the night such as noon, night, and midnight, the preposition used must be "at", not "in", this is an exception to the rule.

Some English native speakers sometimes also used the preposition “at” to express weekend and Christmas. Then, it becomes “at the weekend” and “at Christmas.” So, whether you want to use “at” or “on”, both are correct.

“At” Preposition of Time Examples:

●      Are you going to watch The Nun at 10 p.m?

●      The restaurant closes at midnight.

●      Let’s talk about our plan at dinnertime

Sources:

https://www.english-academy.id/blog/in-on-at-preposition-of-place-time

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