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
at month
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "at month" is not correct and does not convey a clear meaning in written English.
It is not typically used in any context, as it lacks clarity and specificity. Example: "We will review the progress at month end."
⚠ May contain grammatical issues
Science
News & Media
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
At month 3, blood pressure and weight decreased significantly.
The end-of-study visit was at month 12.
Fifty-nine completedetoxificationon, 58 (81%) were followed-up at month 6 and 53 (74%) at month 12.
At month 6, only 17 patients (6.5%) and at month 12, only 12 patients (6.6%) reported migraine with aura.
However, such reduction in macular thickness at month 3 has continued at month 6 only in two patients out of the 6 and was maintained in another two.
In category 2, the median dose was 20 mg/day and was reduced to 12.5 mg/day at month 3 and to 8 mg/day at month 6.
At month 3 after start of treatment, serum HCV RNA was not detectable in one patient.
Science
Also shutting down at month end is Yahoo Maps.
News & Media
Fourteen subjects (50%) did not show any changes in VA at month 3.
There were no statistically significant differences between the two study groups at month 6.
This trend was also observed at month 19.
Science
Expert writing Tips
Best practice
To ensure clarity and grammatical correctness, always use "in", "during", or "by the end of" instead of the phrase "at month".
Common error
Avoid using "at month" without specifying which part of the month is being referenced. Always clarify the timeframe by using alternatives like "at the beginning of the month" or "by the end of the month" to avoid ambiguity.
Source & Trust
81%
Authority and reliability
2.8/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "at month" functions as an adverbial modifier intended to specify a point in time. However, Ludwig AI indicates that it's grammatically incorrect and requires revision to convey the intended meaning accurately.
Frequent in
Science
87%
News & Media
7%
Formal & Business
6%
Less common in
Academia
0%
Encyclopedias
0%
Reference
0%
Ludwig's WRAP-UP
In summary, while the phrase "at month" appears frequently, particularly in scientific and news-related sources, Ludwig AI flags it as grammatically incorrect. The intended meaning is to specify a time within a month, but the phrasing requires correction. Accurate alternatives include "in the month of", "during the month of", or more specific time references such as "at the beginning of the month" or "by the end of the month". When writing, avoid using "at month" to maintain grammatical accuracy and clarity. Instead, adopt one of the suggested alternatives to ensure your writing is precise and error-free.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
in the month of
Replaces "at" with "in the" for better grammatical flow.
during the month of
Similar to "in the month of", but emphasizes a period within the month.
within the month of
Implies something happening inside the boundary of a specified month.
by the end of the month
Focuses on the deadline or completion within a given month.
at the beginning of the month
Specifies the initial phase of a month.
early in the month
Specifies the initial phase of a month, less precise than the previous.
later in the month
Indicates the latter part of a month.
towards the end of the month
Highlights the approach to the conclusion of the month.
each month
Refers to monthly occurrences in a general way.
monthly
Adjectival form indicating something happening every month.
FAQs
How can I correctly use a preposition to specify a time within a month?
Instead of saying "at month", use "in the month of", "during the month of", or specify a time, such as "at the beginning of the month" or "by the end of the month".
What's the difference between saying "at month" versus "in the month of"?
"At month" is grammatically incorrect. The correct way to express that something happens within a specific month is to use "in the month of".
Is it ever correct to use "at month" in a sentence?
Generally, no. The phrase "at month" is not grammatically standard. It's better to rephrase using alternatives that specify the time frame more accurately, like "during the month of" or "by month's end".
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
81%
Authority and reliability
2.8/5
Expert rating
Real-world application tested