in a different day vs in different day

'On a different day' is the proper English phrasing. The preposition 'on' is needed before 'a different day' to indicate a specific day. 'In different day' is incorrect because 'different day' needs an article like 'a' to make it grammatically correct.

Explained by Gregg
Editor at TextRanch

Last updated: February 19, 2025 • 6433 views

This phrase is incorrect. The preposition 'in' should be replaced with 'on' to indicate a specific day.

"in a different day"

The correct phrase is 'on a different day,' which is used to refer to a specific day in the future or past that is different from the current day.

Show examples from the web [+]

(Laughter) That's a topic for a different day.
That is a different problem for a different day.
These doors, every single one, leads to a different day in my life.
Women's Day in Europe is, today, a different day from the one we remember, at least in Central and Eastern Europe.
By... a different day I meant... well... enjoyable.
So, you've been celebrating your birthday on a different day?
The transfer from the son's sneakers could have happened from slamming the brakes on a different day.
Different day, we would have.
These 3 victims vary in age and were last seen in various public locations on different days.
The comparative tests of SRTT and candidate tyres shall be repeated on two different days.
Do all that stuff on different days.
~ Same equipment, different day, one could argue.
If you want to change your "Patch Change Day" to a different day of the week talk to your doctor.
All animals should be assessed in the same physiological condition and preferably detailed or neurological assessments should therefore be scheduled for a different day than clinical biochemistry sampling.
This time, the Conference of Presidents decided that it was preferable to vote separately on a different day, namely 28 January, and to hold the debate this week.
Look, is it OK if we do this a different day?
Different people drive on different days.
But pressed up against these democratic aspirations was a very different day-to-day experience, especially in Egypt.
Then, on a totally different day that was definitely not the next morning, Aunt Robin had to face her worst fear.
And we get dessert on different days.

Alternatives:

on a different day
on another day
on a separate day
on a different occasion
on a different date

This phrase is incorrect. 'Different day' needs an article like 'a' to make it grammatically correct.

"in different day"

The correct phrase should be 'on a different day' to indicate a specific day that is different from the current day.

Show examples from the web [+]

Therefore, if the first alert is for example at 23:30 and the first intervention is at 00:30, than these events have to be reported in different days (d and d+1 respectively).
Places on Earth take the sun rays in different angles throughout day.
Elections to the European Parliament currently take place over a period of several days as they are held on different days in different Member States.
These doors, every single one, leads to a different day in my life.
And I know all the things you've done because I deal with it every day in different people.
Identical clues showed up in several crossword puzzles in different newspapers on the day your husband died.
The car's image is truly different in the day.
'Cause doing a selfie meant something different in my day.
It was different in my day.
Sometimes we were shooting three different films in one day.
Three different bombings in one day.
I'm telling you, she was a completely different girl in those days.
In those days, different from today we actually did real studio screen tests.
I am prepping for three different surgeries in one day, chasing animal parts all over the hospital.
And being so many different sizes in a day, it is very confusing.
MS affects people in different ways: some days can be good, some days can be bad.
You think it was that different back in your day?
You think it was that different back in your day?
Because, the point is, I was different in those days. I was. I was.
Because, the point is, I was different in those days.

Alternatives:

on a different day
on another day
on a separate day
on a different occasion
on a different date

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in a different day vs in different day

"in a different day"

"in different day"

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