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
during the first day
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "during the first day" is correct and usable in written English.
It can be used to refer to a specific time frame within the initial day of an event or occurrence. Example: "During the first day of the conference, attendees will have the opportunity to network and attend various workshops."
✓ Grammatically correct
Science
News & Media
Formal & Business
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
60 human-written examples
The diagramed deal occurred during the first day of the Open Swiss.
News & Media
A standout for me during the first day was Samiya Parvez's "Redefine yourself".
News & Media
The most dramatic deal during the first day of play is shown in the diagram.
News & Media
The winds were ramped up during the first day.
Science
Mild discomfort was present only during the first day of the acute period.
Science
Neurological examination and grading of HIE were performed during the first day of life.
Science
Colloids were mainly given during the first day of ICU stay, with a consistent decline thereafter.
Science
Based on results the most NH3 losses occurred during the first day after application of fertilizer.
The surplus during the first day was redundant power and was stored in the storage system.
There were few significant differences by language proficiency during the first day after the earthquake.
The patients documented the time points of gum and water intakes during the first day.
Science
Expert writing Tips
Best practice
When describing events occurring shortly after a specific starting point, "during the first day" clearly establishes the timeframe.
Common error
Avoid using "during the first day" when a more precise time is known. If something happened at 9 AM on the first day, specify "at 9 AM on the first day" rather than "during the first day".
Source & Trust
84%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "during the first day" functions as an adverbial phrase, modifying a verb by specifying when an action or event occurred. As Ludwig AI explains, it indicates a timeframe within the initial day of a given event or activity.
Frequent in
Science
60%
News & Media
30%
Formal & Business
10%
Less common in
Wiki
0%
Encyclopedias
0%
Reference
0%
Ludwig's WRAP-UP
In summary, the phrase "during the first day" is a grammatically sound and commonly used adverbial phrase that specifies the timing of an action or event within the initial 24-hour period. As Ludwig AI confirms, the phrase is appropriate for use in various contexts, including science, news, and formal writing. When using the phrase, ensure it accurately reflects the intended timeframe and avoid it when a more specific time is known. Remember that alternative phrases such as "on the initial day" or "on day one" can provide stylistic variation.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
on the initial day
Replaces "first" with "initial", emphasizing the beginning.
on day one
Uses a more concise and informal expression.
throughout the first day
Emphasizes the entire duration of the first day.
in the course of the first day
A more formal way of expressing the same timeframe.
within the first 24 hours
Specifies the timeframe using hours instead of referring to a day.
at the commencement of the event
Uses a more formal and abstract way to refer to the beginning.
at the start of the period
Generalizes the timeframe to a period instead of a specific day.
upon initiation
A very formal and concise way to express the beginning.
at the outset
Emphasizes the very beginning of an event or process.
at the inception
Uses a more abstract and formal term for the start.
FAQs
How can I use "during the first day" in a sentence?
Use "during the first day" to indicate that something occurred at some point within the initial day of an event or process. For example, "During the first day of the conference, attendees networked and attended workshops."
What are some alternatives to "during the first day"?
You can use alternatives like "on the initial day", "on day one", or "throughout the first day" depending on the context.
Is it better to say "on the first day" or "during the first day"?
Both "on the first day" and "during the first day" are grammatically correct, but "during the first day" implies a period of time within the day, while "on the first day" can refer to a specific event or the day as a whole.
What's the difference between "during the first day" and "at the first day"?
"During the first day" refers to actions or events that occurred at some point in the course of that day. "At the first day" isn't idiomatic; instead, use "on the first day" to refer to something happening specifically on that 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
84%
Authority and reliability
4.5/5
Expert rating
Real-world application tested