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
remained valid until
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "remained valid until" is correct and usable in written English.
You can use it to indicate the duration of validity for a statement, agreement, or condition. Example: "The contract remained valid until the end of the fiscal year."
✓ Grammatically correct
Science
News & Media
Encyclopedias
Alternative expressions(1)
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
1 human-written examples
has essentially remained valid until recently in spite of the fact that the algorithms used to realize different stages of the structure elucidation process were continuously varied and improved during the last forty years.
Science
Human-verified similar examples from authoritative sources
Similar Expressions
58 human-written examples
Canadian Plus memberships will remain valid until the end of this year.
News & Media
As such, palaeotemperature estimates based on oxygen and hydrogen isotope ratios of chert and silica remain valid until a compelling argument can be presented to the contrary.
Science
Technically speaking, the long-term uptrend will remain valid until we see a close below the moving average, currently just below $15.
News & Media
In 1627 Ferdinand II promulgated the Renewed Land Ordinance, a collection of basic laws for Bohemia that remained valid, with some modifications, until 1848; he issued a similar document for Moravia in 1628.
Encyclopedias
Mr. Wu said during his first trial in August that the police had tortured him until he confessed, but judges decided that his confession remained valid.
News & Media
Consequently, he said, the state's appeal remained valid.
News & Media
NATO's secretary-general, Jaap de Hoop Scheffer, said the promise remained valid.
News & Media
Thus, the prediction remained valid.
Science
If Mr. Hussein remains, the memorandums would probably remain valid.
News & Media
Those concerns remain valid.
News & Media
Expert writing Tips
Best practice
When using "remained valid until", clearly specify the exact date or event that marks the end of the validity period to avoid ambiguity. For example, instead of "The offer remained valid until recently", use "The offer remained valid until July 31, 2025".
Common error
Avoid using vague or relative time references like "recently" or "soon" with "remained valid until". Always use a precise date or event to clearly define the period of validity. Vague references can cause confusion and misinterpretations.
Source & Trust
84%
Authority and reliability
4.3/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "remained valid until" functions as a verb phrase that specifies the duration of validity for something. Ludwig AI shows examples from diverse sources, affirming its role in indicating the period during which a condition or agreement holds true.
Frequent in
News & Media
27%
Science
27%
Encyclopedias
11%
Less common in
Wiki
9%
Formal & Business
4%
Reference
0%
Ludwig's WRAP-UP
The phrase "remained valid until" is a grammatically correct and versatile way to express the duration of something's validity. As Ludwig AI confirms, it's commonly found in news, science, and encyclopedia contexts, indicating its broad applicability. While not exceptionally formal, it maintains a neutral tone suitable for diverse writing scenarios. When using this phrase, clarity is key: specify the exact date or event marking the end of the validity period. Be aware that a range of alternative phrases exists, such as "was effective until" and "stayed in effect until", each with subtle nuances that can better suit specific contexts.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
Retained its validity until
Highlights the retention of validity and adds the possessive "its" for clarity, although with an extra word.
Was effective until
Replaces "remained valid" with "was effective", focusing on the practical effectiveness rather than formal validity.
Stayed in effect until
Substitutes "remained valid" with "stayed in effect", emphasizing the continuation of a rule or regulation.
Held true until
Replaces "remained valid" with "held true", implying that a statement or belief was accurate up to a certain point.
Continued to apply until
Focuses on the ongoing application of a rule or condition, replacing "remained valid".
Persisted until
Highlights the duration of existence or effect, implying a continuation of validity.
Was good until
An informal alternative to “remained valid,” indicating the period for which something is usable or acceptable.
Lasted until
Emphasizes the duration of something’s validity, indicating the endpoint.
Was operative until
A more formal replacement for “remained valid”, suggesting that something was functioning or in force until a specified time.
Kept its force until
Replaces "remained valid" with "kept its force", suggesting the continued power or influence of something until a particular time.
FAQs
How can I use "remained valid until" in a sentence?
Use "remained valid until" to indicate that something was in effect or considered true up to a specific point in time. For example, "The ticket remained valid until yesterday."
What are some alternatives to "remained valid until"?
Alternatives include "was effective until", "stayed in effect until", or "held true until", depending on the specific context.
Is it better to use "remained valid until" or "was valid until"?
"Remained valid until" implies a continuation of validity from a previous state, while "was valid until" simply states the period of validity. The choice depends on whether you want to emphasize the continuation or simply state the validity period.
What's the difference between "remained valid until" and "expired on"?
"Remained valid until" indicates the period during which something was valid, whereas "expired on" specifies the exact date when something became invalid. "Remained valid until December 31st" and "expired on December 31st" both convey similar information but emphasize different aspects.
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
4.3/5
Expert rating
Real-world application tested