Used and loved by millions
Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.

Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com
one day apart
Grammar usage guide and real-world examplesUSAGE SUMMARY
"one day apart" is correct and usable in written English.
You can use this phrase to describe two events or occasions that are separated by one day. For example: "My birthday and my brother's birthday are only one day apart."
✓ Grammatically correct
Science
News & Media
Alternative expressions(20)
separated by a day
on consecutive days
one day following
one day removed
day after day
on previous days
on rainy days
on warm days
a day together
a week apart
two gifts in a row
two questions in a row
two Tests in a row
a day apart
on windy days
in separate stages
on consequent days
in individual days
two months in a row
in different days
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Human-verified examples from authoritative sources
Exact Expressions
45 human-written examples
The fact that they passed on one day apart was symbolic of their extraordinary devotion and connection to each other.
News & Media
It is noteworthy that the correlation coefficient for treadmill-induced angina on tests one day apart was 0.70 [ 39] and for patient-reported angina was 0.83 when SAQ was applied three months apart [ 40].
Five CD patients on GFD and 5 healthy controls were also studied with the same protocol on 2 occasions, one day apart, to test for reproducibility of results.
Science
Pigeons generally lay two eggs one day apart, which hatch 18 days after they are laid [ 1].
Science
The experiment was duplicated in two separate experimental blocks by splitting F3 mosquitoes from the same batch into two groups and infecting each group on two successive days with the same viral culture harvested one day apart.
Science
Due to the game show's taping schedule, the records were actually set one day apart, with Holzhauer's new high score occurring on Feb. 12. Wednesday's win marks the 10th consecutive win for the 34-year-old Holzhauer.
News & Media
Human-verified similar examples from authoritative sources
Similar Expressions
15 human-written examples
We've met the Queen twice in one day and, apart from the Duke of Edinburgh, there can't be many people who can say that".
News & Media
Without asking, I got a glimpse into the seed of a sibling rivalry that will one day tear apart the house that weed trimmers built.
News & Media
About a year ago the idea of "Mothers' Day" was originated to do honour to the mothers of England by setting apart one day, on which, without any appeal to sect or creed, any selling of flags, or jingling of collection boxes, each might stand still for a moment in the hurry and bustle of every-day life and think, without fear of false sentiment, of the debt he owed his mother.
News & Media
Players can be praised one day and taken apart the next.
News & Media
Early settlers following Gist through Pound Gap soon broke out a good pack trail down North Fork, and established camp sites one day's journeys apart.
Academia
Expert writing Tips
Best practice
Use "one day apart" to clearly indicate a short time interval between two events, measurements, or observations. This phrasing is suitable for both technical and general writing.
Common error
Avoid using "one day apart" when you actually mean the same day or several days apart. Ensure the context clarifies that the events are on different, but adjacent, days.
Source & Trust
81%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "one day apart" functions as an adverbial phrase, modifying a verb to specify the interval between two occurrences. As noted by Ludwig AI, this phrase is grammatically sound and used to describe a temporal separation.
Frequent in
Science
44%
News & Media
44%
Formal & Business
6%
Less common in
Wiki
2%
Academia
2%
Encyclopedias
2%
Ludwig's WRAP-UP
The phrase "one day apart" is a grammatically correct and commonly used adverbial phrase that signifies a temporal separation of one day between two events or occurrences. Ludwig AI confirms its usability and correctness in written English. Predominantly found in scientific and news contexts, it serves to provide a precise indication of time. Alternatives include "separated by a day" or "on consecutive days". When writing, ensure clarity and context, and avoid confusing it with events occurring on the same day or over longer intervals. "One day apart" accurately conveys that two distinct but successive days are involved.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
on consecutive days
Implies that the events happened on sequential days.
within a day of each other
Focuses on the closeness of the two events.
separated by a day
Focuses on the separation between the events rather than their proximity.
24 hours apart
Specifies the exact time difference.
a day's difference
Emphasizes the duration of the difference between two points in time.
one day following
Emphasizes the sequence of events.
with a day between
Highlights the existence of an intervening day.
a single day's interval
Highlights the short duration of the interval.
one day removed
Suggests a slightly more distant relationship, though still close in time.
day after day
Indicates a continuous sequence of days, not just a single interval.
FAQs
How can I use "one day apart" in a sentence?
You can use "one day apart" to describe events or measurements that occur on consecutive days. For example, "The measurements were taken "one day apart" to ensure accuracy".
What's a synonym for "one day apart"?
Alternatives include "separated by a day", "on consecutive days", or "24 hours apart", depending on the context.
Is it correct to say 'the events are one day apart'?
Yes, it is grammatically correct and commonly used. The phrase indicates that two events occurred on successive days.
What is the difference between "one day apart" and "a day apart"?
Both phrases are essentially interchangeable and convey the same meaning. "A day apart" might sound slightly more informal, but both are widely understood.
Editing plus AI, all in one place.
Stop switching between tools. Your AI writing partner for everything—polishing proposals, crafting emails, finding the right tone.
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Source & Trust
81%
Authority and reliability
4.5/5
Expert rating
Real-world application tested