on which day

USAGE SUMMARY

The phrase "on which day" is correct and usable in written English.
It is used to inquire about the day of an event or the day something will occur. For example: "I'm planning a party - on which day should I hold it?".

✓ Grammatically correct

News & Media

Science

Formal & Business

Human-verified examples from authoritative sources

Exact Expressions

60 human-written examples

In addition, respondent was asked on which day or days the child had diarrhea.

BMC Public Health

Prices: Tickets start at $101.99 per person plus tax for one night -- Florida resident rates range from $49.99 to $76.99 (depending on which day you go) when ordered online.

Huffington Post

We try to remember what we've seen on which day.

The Guardian - Travel

It depends on which day you catch them.

The Guardian

"On which day was it?" "It happens to be today," she said.

The New Yorker

"You had to sort out which person was who on which day.

The New York Times - Travel

No need to wonder on which day of the week this takes place.

The New York Times - Books

The official would not say on which day Mr. Bradley would speak.

The New York Times

And Alan Hevesi is running on the left and the right depending on which day you read the paper.

The New York Times

I never knew on which day of my cycle this pain and nausea would begin or end.

The Guardian

Mark Carney, who prides himself on being a great communicator, seems to have a different message depending on which day of the week it is.

The Guardian - Business

Expert writing Tips

Best practice

When using "on which day" in formal writing, ensure it clearly introduces a specific day related to the subject. For example, "The meeting will be held on June 15th, on which day all attendees must be present."

Common error

Avoid using "on which day" in informal contexts where simpler alternatives like "what day" or "which day" are more appropriate. Using overly formal language in casual conversation can sound unnatural.

Linguistic Context

The phrase "on which day" functions as an interrogative or relative adverbial phrase. As Ludwig AI confirms, it introduces a question or clause specifying a particular day, often relating it to an event or action. It helps to clarify the timing of something.

Expression frequency: Very common

Frequent in

News & Media

50%

Science

31%

Formal & Business

7%

Less common in

Encyclopedias

2%

Wiki

5%

Reference

0%

Ludwig's WRAP-UP

In summary, "on which day" is a grammatically sound and versatile phrase used to inquire about or specify a particular day. Ludwig AI validates its correctness and usability in written English. Its formality makes it suitable for news, science, and formal business contexts, while simpler alternatives exist for more casual settings. Awareness of its formality level and careful source selection ensures effective communication. The phrase appears frequently in authoritative sources, marking it as a reliable choice for precise temporal specifications.

More alternative expressions

Phrases that express similar concepts, ordered by semantic similarity:

on what date

Replaces "day" with "date", offering a more formal alternative. It still refers to a specific point in time.

on which date

Synonymous with "on what date", focusing on the specific calendar day.

what day

A more concise and informal version, omitting "on which".

which day

Simplified version of the original phrase, suitable for less formal contexts.

the day when

Rephrases the query using "when", focusing on the event occurring on that day.

on the day that

More descriptive, specifying the exact day of an event.

what specific day

Emphasizes the need for a precise day, adding more clarity.

the particular day when

Highlights a specific day of interest, adding emphasis.

during which day

Implies a span of time within a single day, adding a temporal nuance.

upon which day

A more archaic and formal version, maintaining the same core meaning.

FAQs

How can I use "on which day" in a sentence?

Use "on which day" to specify a particular day an event occurs or a decision is made. For example, "The verdict will be announced on Friday, on which day the defendant must appear in court."

What are some alternatives to "on which day"?

Alternatives include "what day", "which day", "on what date", or "the day when". The best choice depends on the context and desired level of formality.

Is "on which day" formal or informal?

"On which day" is generally considered a more formal phrasing. Simpler options like "which day" or "what day" are suitable for informal settings.

What's the difference between "on which day" and "what day"?

"On which day" is more formal and often used in legal or official contexts to clearly specify a date. "What day" is more casual and commonly used in everyday conversation.