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 the specified days
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "on the specified days" is correct and usable in written English.
You can use it when referring to particular days that have been previously mentioned or agreed upon. Example: "The event will take place on the specified days, so please mark your calendar accordingly."
✓ Grammatically correct
Science
News & Media
Wiki
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
3 human-written examples
Aliquots were counted for total and viable cell numbers on the specified days and fresh media was added to replenish and maintain the total volume of media in the flask.
Science
On the specified days after infection, the mice were either sacrificed in order to identify the number of antigen-specific cells or re-infected intranasally with 10,000 PFU of VSV-HA.
Science
Blood samples (300 μl) were collected from mice tail veins on the specified days, in the presence of heparin, and the plasma was further separated by centrifugation (1200 r.p.m. for 10 min).
Science
Human-verified similar examples from authoritative sources
Similar Expressions
57 human-written examples
On the specified day after infection, mice were challenged with 5000 PFU of the PR8 strain of influenza.
Science
Get to the polls between 7am and 7pm on the specified day.
Wiki
After the specified days, the peak time was accurately forecasted.
Science
Therefore, the expected lifetime of the proposed routing protocol on specified days depends on the event of the arrival rates and can be described as the energy that is needed to detect or sense the events continuously within a day, as shown by Eq. 16 [24].
Mr. Vitale sent 8,000 e-mail messages asking people to buy his book, "Spiritual Marketing: A Proven Five-Step Formula for Easily Creating Wealth from the Inside Out," from Amazon.com on one of two specified days last June; in return he offered them access to marketing articles posted at his Web site that normally were not available without a fee.
News & Media
The fluorescence images were then recorded on specified days at the emission wavelength of the dye incorporated into the constructs.
Science
In urban areas, free contraception is provided at government hospitals, but only on specified days and the queues are long which acts as a deterrent.
News & Media
Some clinics offer dedicated sessions for hypertension and its complications on specified days of the week, designed to allow more time for detailed assessments and patient education.
Science
Expert writing Tips
Best practice
When using the phrase "on the specified days", ensure the context clearly defines which days are being referred to, either through previous mention or a clear point of reference.
Common error
Avoid using "on the specified days" without clearly establishing which days are being specified. This can lead to confusion and require readers to search for the intended meaning.
Source & Trust
80%
Authority and reliability
4.1/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "on the specified days" functions as a prepositional phrase modifying a verb or noun. It provides a temporal specification, indicating when an action or event takes place. Ludwig AI confirms its usability in written English.
Frequent in
Science
66.66%
News & Media
22.22%
Wiki
11.12%
Less common in
Encyclopedias
0%
Formal & Business
0%
Academia
0%
Ludwig's WRAP-UP
In summary, "on the specified days" is a grammatically sound prepositional phrase used to indicate that an action or event will occur on particular days that have been previously identified. Ludwig AI validates its correct usage. While relatively rare, it's commonly found in scientific and news contexts. For clarity, ensure the context clearly defines the days being specified. Alternatives include "on the designated dates" or "on the aforementioned days" for slight variations in tone.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
on the designated dates
Replaces "specified" with "designated", implying a more formal or official selection of dates.
on the aforementioned days
Uses "aforementioned" to refer to days previously mentioned, adding a formal tone.
on the indicated days
Substitutes "specified" with "indicated", suggesting that the days were pointed out or made known.
on the scheduled days
Replaces "specified" with "scheduled", implying that the days were planned or arranged in advance.
on the determined days
Uses "determined" instead of "specified", highlighting that the days were decided upon.
on the agreed-upon days
Replaces "specified" with "agreed-upon", emphasizing mutual consent regarding the selected days.
on those particular days
Adds "those particular" to emphasize the specific days in question.
on the selected days
Uses "selected" to suggest that the days were chosen from a larger set.
during the defined period
Shifts the focus to a "period" rather than specific days, broadening the timeframe slightly.
on the appointed dates
Replaces "specified" with "appointed", giving a more official or formal sense to the selection of dates.
FAQs
How can I use "on the specified days" in a sentence?
You can use "on the specified days" to refer to particular days that have been previously mentioned or agreed upon. For example, "The event will take place on the specified days, so please mark your calendar accordingly."
What can I say instead of "on the specified days"?
You can use alternatives like "on the designated dates", "on the aforementioned days", or "on the indicated days" depending on the context.
Is it better to say "on the specified days" or "on the specified dates"?
Both "on the specified days" and "on the specified dates" are correct and largely interchangeable. "Days" is often used for events occurring within a shorter timeframe, while "dates" can refer to more spaced-out occurrences, but the difference is subtle.
When should I use "on the specified days" versus "on those days"?
"On the specified days" implies that the days have been explicitly defined or mentioned earlier. "On those days" is more general and can refer to days understood contextually, even without being explicitly stated. If the days are clearly defined, "on the specified days" is more precise.
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
80%
Authority and reliability
4.1/5
Expert rating
Real-world application tested