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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 which date
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "on which date" is correct and usable in written English.
It is typically used to inquire about a specific date related to an event or occurrence. Example: "Can you please tell me on which date the meeting is scheduled?"
✓ Grammatically correct
News & Media
Science
Wiki
Alternative expressions(7)
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
11 human-written examples
Using all available resources, each pair should find the answers to the following guiding questions (distributed on a handout for easier student access): DATE: On which date is the new year traditionally celebrated in this culture or religion?
News & Media
There was a brief warm spell around 9 September, on which date the highest September temperature for six years was recorded, but much of the rest of the month was cool.
News & Media
In addition, Ometecuhtli ("Lord of the Duality") and Omecihuatl ("Lady of the Duality") were held to abide in the 13th heaven: they decided on which date a human being would be born, thus determining his destiny.
Encyclopedias
What activity did you participate in and on which date? 2. Did you find this experience to be beneficial to your education?
Since some events need key guests, MyPunchbowl also lets you pick VIPs, who have a greater effect on which date the algorithm recommends.
News & Media
The election, however, had taken place on 3 October 1998, on which date Hill was still a dual national.
Wiki
Human-verified similar examples from authoritative sources
Similar Expressions
49 human-written examples
I would be grateful if you could provide the committee with further information on which dates Mr Ashley is out of the country.
News & Media
Find out on which dates each will be deducting your monthly payment.
Wiki
If you ask for a loan, have a repayment plan outlined that you can show them, setting out the amounts you would repay on which dates.[7].
Wiki
For example, if you are answering interrogatory questions regarding a traffic accident and are asked, "On which dates did you visit the doctor?," you may object to the question for being too vague.
Wiki
An example might be, "On which dates did you visit the doctor?" Since the condition and type of doctor are not specified in the question, it is impossible to know how much information you need to provide.
Wiki
Expert writing Tips
Best practice
When using "on which date", ensure the context is formal or requires a specific emphasis on the date itself. In more casual contexts, "what date" is often more appropriate.
Common error
Avoid using "on which date" in informal settings; it can sound stilted. Opt for simpler alternatives like "what date" or "when" for everyday conversations.
Source & Trust
81%
Authority and reliability
4.2/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "on which date" functions as an interrogative prepositional phrase, typically used to inquire about the specific day, month, and year of an event. Ludwig confirms this usage.
Frequent in
News & Media
33%
Science
33%
Wiki
20%
Less common in
Encyclopedias
8%
Formal & Business
3%
Academia
0%
Ludwig's WRAP-UP
In summary, the phrase "on which date" serves as a grammatically sound, albeit somewhat formal, way to inquire about a specific calendar date. As Ludwig indicates, its usage is appropriate and understandable across various contexts, though simpler alternatives like "what date" are often preferred in less formal settings. This phrase is most frequently encountered in news, science, and wiki-based sources. While grammatically correct and widely understood, remember to consider the tone of your writing and audience when choosing between "on which date" and its simpler alternatives.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
what date
This is a more direct and common way to ask for a specific date.
what is the date
This is a more direct question inquiring about the date.
which date
Omission of preposition.
date on which
Inverted word order compared to the original phrase.
on what day
This alternative specifies the 'day' aspect, but omits the year or month.
when exactly
Adding "exactly" to specify a more precise timing
when
This is a very general way to ask for a time, lacking the specificity of a date.
specify the date
This shifts from a question to a command, asking for the date to be specified.
indicate the date
Similar to 'specify the date', but uses 'indicate' instead.
at what time
Broadens the search by asking for the time instead of just the date.
FAQs
How can I rephrase "on which date" for simpler conversation?
Is "on which date" too formal for casual writing?
While grammatically correct, "on which date" can sound overly formal in casual writing. Consider using "what date" for a more relaxed tone.
What's the difference between "on which date" and "what date"?
"On which date" is more formal and emphasizes the specific date. "What date" is a more common and less formal way to ask the same question.
How to use "on which date" in a formal sentence?
You can use "on which date" in formal contexts, such as "Please specify on which date the project will be completed" or "Could you indicate on which date the payment was made?"
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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
4.2/5
Expert rating
Real-world application tested