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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
the instant when
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "the instant when" is correct and usable in written English.
It can be used to refer to a specific moment in time when something occurs or is about to occur. Example: "I will never forget the instant when I first saw the ocean."
✓ Grammatically correct
News & Media
Science
Encyclopedias
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
We could almost count off the footsteps to the instant when he would raise his head.
News & Media
Moqadam pinpoints the instant when Mohsen shrugs off his apathy and challenges the regime.
News & Media
She would be beautiful, in the instant when he pressed the shutter release.
News & Media
A violent death can do that, mark the instant when people suddenly notice the ground has shifted.
News & Media
A gorgeous new song, When, notes the instant when "a touch comes down on who it's meant to rest".
News & Media
From the instant when the couple realise that their relation is something stronger than mere friendship, their happiness is lost.
News & Media
It is something that people can say in the instant when they are racing through their mental files for some recollection of the person before them.
News & Media
No, what sets her off is the instant when the blond wig she's worn for five years to blend in with her neighbors flies off, revealing her alopecia.
News & Media
In the instant when those two were beaten again – by Klaas-Jan Huntelaar's thunderous header – the notion of Pearce's England boys offering a fresh start was entirely deconstructed.
News & Media
All I will say is that if you fused the instant when heartbreak occurs to the instant when one falls in love and shot that concoction straight into your brain stem you might have a sense of what it felt like for me to be back "home".
News & Media
While this tendency fades with repeated use, you wonder if your gaze will be elsewhere at the instant when Night Vision reveals trouble up the road.
News & Media
Expert writing Tips
Best practice
Use "the instant when" to highlight the immediate and often impactful nature of an event. It's more emphatic than simply saying "when".
Common error
While grammatically sound, avoid overusing "the instant when" in highly formal writing. Alternatives like "at the point when" or "the moment at which" might provide a more sophisticated tone depending on the specific context.
Source & Trust
88%
Authority and reliability
4.6/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "the instant when" functions as an adverbial phrase, specifying a particular point in time. It introduces a clause that describes when an event occurred. Ludwig provides numerous examples to support its correct usage.
Frequent in
News & Media
43%
Science
42%
Encyclopedias
5%
Less common in
Formal & Business
2%
Reference
0%
Wiki
0%
Ludwig's WRAP-UP
In summary, the phrase "the instant when" is a grammatically correct and commonly used adverbial phrase that specifies a precise moment in time. According to Ludwig, its function is to introduce a clause describing when something happens, emphasizing the immediacy of the event. While Ludwig examples show it appearing frequently in "News & Media" and scientific contexts, it can also be found in encyclopedias and other writing, having a mostly neutral formality register. While grammatically impeccable, users must avoid overuse in formal contexts, and be aware of alternative wording if appropriate.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
the moment that
Replaces 'instant' with 'moment', indicating a specific point in time, and 'when' with 'that', a common alternative conjunction.
the second that
Substitutes 'instant' with 'second', emphasizing a very brief duration.
the point at which
Replaces 'instant when' with a more formal phrase, 'point at which', denoting a specific time.
the time that
Uses the general term 'time' instead of 'instant', offering a broader reference to a specific occasion.
the occasion when
Replaces 'instant' with 'occasion', referring to a particular event or time.
the juncture at which
This offers a more formal and less common alternative to "the instant when", pointing to a crucial time.
the split second when
Adds 'split' to emphasize the very short duration of the moment.
the precise moment when
Adds 'precise' to stress the exactness of the timing.
the very second that
Emphasizes the immediacy and brevity of the moment.
at the moment that
Changes from noun phrase to prepositional phrase, rephrasing the sentence to focus on "the moment".
FAQs
How can I use "the instant when" in a sentence?
"The instant when" connects a specific point in time with an event. For example, "I'll never forget the instant when I met her."
What are some alternatives to "the instant when"?
Alternatives include "the moment when", "the second that", or "the time that" depending on the context.
Is it correct to say "the instant that" instead of "the instant when"?
Yes, "the instant that" is also grammatically correct and can be used interchangeably with "the instant when". For example, "I knew it was wrong the instant that I heard it".
What is the difference between "the instant when" and "immediately after"?
"The instant when" refers to the precise moment something happens, while "immediately after" refers to the period directly following an event. They both indicate short succession but "the instant when" is more about simultaneity.
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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
88%
Authority and reliability
4.6/5
Expert rating
Real-world application tested