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
establish when
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "establish when" is correct and usable in written English.
You can use it when discussing the need to determine a specific time or date for an event or action. Example: "We need to establish when the meeting will take place to ensure everyone can attend."
✓ Grammatically correct
News & Media
Science
Encyclopedias
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
58 human-written examples
It is also tricky to establish when this might happen.
News & Media
Tests could take up to a month to establish when the victims died, Mr Boluchevsky added.
News & Media
When it finally arrived, I attempted to establish when I would be able to benefit.
News & Media
It has proved harder to establish when eastern Polynesia was settled.
Encyclopedias
Absolutes are hard to establish when many victims, in the grip of an illicit people-smuggling trade, are never recovered.
News & Media
Experts at the zoo monitored Tian Tian's hormones to establish when she would enter her brief fertile period.
News & Media
And in the destination countries, it's up to law enforcers to establish when those objects left conflict zones.
News & Media
A bit of common sense can establish when the reader needs reassuring that information comes from a specific source.
News & Media
It's a bond that you can never establish when their parents are around," said Ms. Larson, known to her grandchildren as Mormor.
News & Media
But I think we need clearer terms of engagement, to establish when and how Parliamentary scrutiny should take place, and what it should involve," Coyle said.
News & Media
It was one of a line of examples where the Reynolds defence has proved very difficult to establish when it relying on unidentified sources.
News & Media
Expert writing Tips
Best practice
In project management or planning documents, use "establish when" to set deadlines or milestones, ensuring all team members are aware of the timeline.
Common error
Avoid using incorrect tenses when using "establish when". Ensure the tense matches the context of the sentence. For example, use the past tense when referring to completed events and the future tense for planned events.
Source & Trust
84%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "establish when" functions as a verb phrase often used to indicate the need to ascertain or set the timing of an event, action, or occurrence. As Ludwig AI confirms, it is a grammatically sound construction.
Frequent in
News & Media
36%
Science
36%
Wiki
9%
Less common in
Encyclopedias
4%
Formal & Business
2%
Reference
0%
Ludwig's WRAP-UP
In summary, "establish when" is a grammatically correct and frequently used phrase to denote the determination or setting of a specific time or date. Ludwig AI indicates its acceptability and broad applicability across various contexts, particularly in news, science, and encyclopedic writing. Usage guidance suggests that it is crucial to maintaining proper tense. Alternatives such as "determine the timing" or "ascertain the date" can offer similar meanings with slightly different emphasis.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
determine the timing
Focuses on finding out when something will happen.
ascertain the date
Emphasizes confirming the exact date of an event.
identify the moment
Highlights pinpointing a specific point in time.
figure out when
A more informal way of saying "establish when".
set the time
Implies scheduling or arranging a specific time.
decide on the date
Highlights making a decision about a particular date.
discover when
Focuses on finding out when something occurred or will occur.
define the timeframe
Focuses on defining the period in which something happens.
clarify the timing
Emphasizes making the time of an event clear.
recognize when
Highlights acknowledging when an event takes place.
FAQs
How can I use "establish when" in a sentence?
You can use "establish when" to inquire about or determine the timing of an event, like "We need to establish when the project deadline is" or "Scientists are trying to establish when the species diverged".
What phrases are similar to "establish when"?
Similar phrases include "determine when", "ascertain when", or "identify when", all of which imply finding out the timing of something.
Is it better to use "establish when" or "determine when"?
"Establish when" and "determine when" are often interchangeable, but "establish" can imply a more formal or official setting of a time, while "determine" simply means to find out.
What's the difference between "establish when" and "define when"?
"Establish when" typically refers to setting or discovering a specific point in time. "Define when", on the other hand, could involve setting the conditions or criteria for something to occur.
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