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On a day vs in a day

Both "on a day" and "in a day" are correct, but they are used in different contexts. "On a day" is used to refer to a specific day or date, while "in a day" is used to indicate a period of time within a single day.

Last updated: March 27, 2024 • 2374 views

On a day

This phrase is correct and commonly used in English to refer to a specific day or date.

Use "on a day" when you want to specify a particular day or date. For example, "I will see you on Monday."

Examples:

  • She was born on a sunny day in June.
  • The event is scheduled to take place on a rainy day next week.
  • We always go for a picnic on a warm day in spring.
  • I have an important meeting on the first day of the month.
  • They will arrive on the same day as us.
  • On a day like today, I doubt that's possible.
  • On a day like this... we can smell the sky itself.
  • On a day like today, 5 years ago.
  • On a day with no wind, rain that falls quietly, softly.
  • On a day like today, it just feels like people should be together.
  • On a day like today, you should've driven here.
  • On a day like this, many years ago, it was my birthday.
  • On a day like this, we can feel the truth of those words.
  • On a day such as today, we must remind one another that Economic and Monetary Union is intended to be a citizens' project.
  • On a day like today, he should let his son bathe first.
  • On a day like this, one has to live up to expectations.
  • On a day in late August or early September 1941,
  • On a day like this, if all you've got's a niggle, you're laughing, mate.
  • 'On a day like today, you can just let all your worries slip away!
  • On a day when I really, really needed you.
  • On a day like this, it's important to give a thought to those who fight for Norway on a daily basis.
  • On a day that is not the Fourth of July?
  • A man had his hands on my hips On a day that was set aside for the lord!
  • Unbelievable, on a day like today.
  • - My brother died on a day like this.

Alternatives:

  • on Monday
  • on June 1st
  • on a specific day
  • on a particular date
  • on a certain day

in a day

This phrase is correct and commonly used in English to indicate a period of time within a single day.

Use "in a day" when referring to a duration or period of time that occurs within a single day. For example, "I can finish this project in a day."

Examples:

  • He can run a marathon in a day.
  • I will complete this book in a day.
  • She painted the entire house in a day.
  • They traveled to three different cities in a day.
  • I can learn a new language in a day.
  • Russia wasn't conquered in a day...
  • The forest wasn't grown in a day.
  • I'll let you know in a day.
  • Probably in a day or two.
  • We will process around 2,000 meters of cloth in a day.
  • Hard enough to take one of you in a day.
  • I have to write my first song in a day.
  • And your coke demand dies in a day.
  • Speltzer couldn't have done all of this in a day.
  • I can get to London and back in a day.
  • He'd crush us in a day.
  • - We could replace our losses in a day.
  • Could do a lot in a day.
  • Even in a day and a half.
  • Nothing we couldn't hit in a day.
  • The wedding was planned in a day. It's tradition.
  • The matron just said it consumed her in a day.
  • But Rome wasn't destroyed in a day.
  • He can reassemble an engine in a day.
  • The average number of bugs Barry swallows in a day of running.

Alternatives:

  • within a day
  • during a day
  • in one day
  • within 24 hours
  • in a single day

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