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
on next day
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "on next day" is not correct in standard written English.
The correct expression would be "the next day" or "on the following day." Example: "We will meet again on the next day to discuss our progress."
⚠ May contain grammatical issues
Science
News & Media
Wiki
Alternative expressions(20)
the next day
the following day
a day later
the subsequent day
the day after
the very next day
the left leg
on thursday
the following tonight
the very next morning
on the morning of the following day
on wednesday at noon
the following Monday
early tomorrow
on yesterday afternoon
the following yesterday
on tomorrow night
the following wednesday
on the following day
on the following idea
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
15 human-written examples
Hence, we examined the effects of sleep restriction with an advanced wake-time or delayed bedtime on next day EI and EE.
Science
We'd go on next day, at his home, only give him time to write his few words of fiction after breakfast, and without prepared questions, one so much preferred just to talk.
News & Media
On next day, frozen surimi was tempered by keeping at room temperature for 1 h, until the core temperature reached 0 2 °C.
Talking a good game, TransferGo also claims to trump competitors specifically on "next day" bank-to-bank transfers for those users who need to move money fast.
News & Media
The time n represents a step of the process, and the conditional probability distribution for the process at the next step depends only on the current state.An example is given by Fig. 2, where the probabilities of weather conditions (modeled as either sunny (state 1) or rainy (state 2)) on next day is given by the weather on the current day.
In all, 35 000 cells were plated on a 3.5-cm dish and transfected on next day (30 40% confluence).
Science
Human-verified similar examples from authoritative sources
Similar Expressions
45 human-written examples
He finally settled on next Saturday.
News & Media
I'll see you on next Wednesday.
Academia
(Additional performances take place on next Friday and Oct. 27).
News & Media
On next Friday evening New York City Opera's new production, directed by Jay Scheib, opens at the Brooklyn Academy of Music.
News & Media
(The album was originally supposed to come out on next Friday).
News & Media
Expert writing Tips
Best practice
Avoid using "on next day" in formal writing. Opt for more grammatically sound alternatives like "the next day" or "the following day" to maintain clarity and professionalism.
Common error
A frequent mistake is directly translating patterns from other languages where a preposition might be required before "next day". In English, "the next day" functions perfectly well without an additional preposition.
Source & Trust
82%
Authority and reliability
2.8/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "on next day" functions as an adverbial phrase, attempting to specify when an action or event takes place. However, Ludwig indicates it is not correct in standard written English.
Frequent in
Science
34%
News & Media
33%
Wiki
17%
Less common in
Formal & Business
0%
Academia
8%
Reference
0%
Ludwig's WRAP-UP
In summary, while the phrase "on next day" appears in some contexts, including scientific and news-related articles, it's generally considered grammatically incorrect in standard English. Ludwig AI flags it as non-standard. It's best to opt for alternatives such as "the next day" or "the following day" to ensure clarity and grammatical correctness. Despite its occurrence in various sources, relying on the more conventional phrases will improve the overall quality and credibility of your writing.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
the following day
Replaces "on next day" with a more standard and grammatically correct expression for the day after.
the next day
A simpler and more common way to express the same temporal relationship as "on next day".
the subsequent day
A more formal alternative, suitable for academic or technical writing.
the day after
Emphasizes the sequential nature of the events.
on the succeeding day
Similar to 'the subsequent day', it offers a formal way to indicate the following day.
a day later
Focuses on the duration of time passing before the event.
the immediately following day
Stresses the lack of delay before the event.
the very next day
Highlights the immediacy of the event happening the following day.
on the morrow
An archaic and literary alternative, adding a touch of old-fashioned flair.
on the approaching day
Emphasizes the anticipation of the next day as it nears.
FAQs
Is it grammatically correct to use "on next day"?
No, the phrase "on next day" is generally considered grammatically incorrect in standard English. The correct and more common forms are "the next day" or "the following day".
What are some alternatives to "on next day"?
Besides "the next day" and "the following day", you could also use "a day later", depending on the context.
When is it appropriate to use "on next day"?
Given that "on next day" is not considered standard English, it's best to avoid it in formal or professional writing. Opt for grammatically correct alternatives instead.
How does "on next day" differ from "the next day"?
The phrase "on next day" includes an unnecessary preposition, making it grammatically unsound. "The next day" is the standard and accepted way to refer to the day following a specific day.
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
82%
Authority and reliability
2.8/5
Expert rating
Real-world application tested