In, At, On (as Prepositions of Time)

IN is used when talking about months, years, and long time periods such as centuries, seasons or the future.


  • In 2009, a strong typhoon attacked the Philippines and left many damages.
  • I might visit your country in August.
  • We will start the new project in January 2014.
  • I haven’t seen you in centuries!
  • I hope we see each other in the future.
  • In spring, many flowers bloom.


ON is used for dates and days.


  • The organization will be having its 20th Anniversary on July 7, 2010.
  • On June 6, she will start to work.
  • Our family gathers together on New Year’s Eve.
  • My friends surprised me on my birthday.
  • She has no class on Mondays.


AT is used for specific or precise time.


  • We will start our class at 9 o’clock.
  • We usually eat together at dinnertime.
  • She was very upset at that moment.
  • At noon time, the participants will have their lunch break.
  • The sun was very beautiful at sunset.


Is it clear now? I hope this post helps.

Of course, you will be able to learn these words easily if practice them. Good luck! \(^-^)/


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