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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
close of day
Grammar usage guide and real-world examplesUSAGE SUMMARY
"close of day" is a grammatically correct phrase that is commonly used in written English.
It can be used to refer to the end of the day or the time when the day is coming to an end. Example: As the sun began to set, the hikers knew they needed to reach the campsite before close of day.
✓ Grammatically correct
News & Media
Academia
Encyclopedias
Alternative expressions(20)
dinner of the day
solution of the day
dusk
as the day concludes
conclusion of the month
latter part of the day
closing of the day
end of business day
outcome of the day
summary of the day
order of the day
day's end
culmination of the day
conclusion of the election
ends of the day
as night falls
completion of the day
end of play
closure of the day
balance of the day
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
At the close of day, you feel remarkably tired but remarkably well.
News & Media
Shares in Computer Associates traded at $27.91 at close of day Wednesday.
News & Media
MARKET WHEAT MAKES A FRACTIONAL GAIN; Fluctuates Within a Range of 5 Cents, With Slight Rise at Close of Day.
News & Media
As Lewis Biggs summed up in the close of day plenary: "This whole thing is not about culture.
News & Media
(England were four down at the close of day four in Johannesburg, you know. Final hour. Order the valium).
News & Media
Your section assignment for Math Ma,1a,1b,21a,21b will be emailed to you the evening of Friday, September 7th by close of day.
Academia
Archives|MARKET WHEAT MAKES A FRACTIONAL GAIN; Fluctuates Within a Range of 5 Cents, With Slight Rise at Close of Day.
News & Media
At the close of day 10, it held 15 gold medals (the tally at the same stage of the 2012 Games was 31).
News & Media
Slow Deceit is a nursery rhyme set to a thumping beat, while By Close of Day is an oriental synthpop instrumental that Gartside admits he hasn't finished yet.
News & Media
Human-verified similar examples from authoritative sources
Similar Expressions
2 human-written examples
Lise's progress through her last day on Earth runs parallel with flash-forwards reconstructing the close-of-day crime.
News & Media
With a traditional open-end fund, which always transacts at the close-of-day net asset value, there is some certainty that you are paying a market price for the underlying assets.
News & Media
Expert writing Tips
Best practice
When setting deadlines, use "close of day" to imply the end of standard business hours, rather than midnight, to avoid ambiguity.
Common error
Avoid using "close of day" when you specifically mean midnight. "Close of day" typically refers to the end of business hours, while midnight is a precise time.
Source & Trust
89%
Authority and reliability
4.6/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "close of day" primarily functions as an adverbial phrase, modifying a verb or clause to specify when something should be completed or when a certain state should be reached. Ludwig indicates this phrase is grammatically correct.
Frequent in
News & Media
63%
Academia
12%
Science
10%
Less common in
Encyclopedias
5%
Formal & Business
5%
Reference
0%
Ludwig's WRAP-UP
In summary, "close of day" is a grammatically sound and frequently used phrase that functions as an adverbial modifier, commonly signifying a deadline or the end of a period, particularly within business or professional settings. Ludwig confirms the grammatical correctness of the phrase. It enjoys wide usage across diverse sources like news outlets, academic institutions, and encyclopedias, cementing its status as a versatile expression. Alternatives such as "end of the day" or "day's end" can be used to convey similar meanings, but "close of day" often carries a slightly more formal or professional tone. When using this phrase, ensure clarity about whether you're referring to the end of business hours or the absolute end of the day (midnight).
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
end of the day
A more literal and direct way to refer to the conclusion of the day.
day's end
A slightly more poetic and concise way to say the same thing.
at day's end
Emphasizes the time when the day concludes, often used to denote a deadline.
end of business day
More specific, referring to the end of working hours, useful in professional contexts.
end of play
Often used in sports contexts to signify the conclusion of a day's sporting activity.
by day's end
Indicates a deadline that must be met before the day is over.
as night falls
A more descriptive, evocative way to suggest the end of the day.
dusk
Refers to the time of day immediately following sunset, marking the transition to night.
sundown
An alternative term for sunset, commonly used to mark the end of a period or activity.
nightfall
The time when night begins, marking a clear end to the day's activities.
FAQs
How can I use "close of day" in a sentence?
You can use "close of day" to indicate a deadline or the end of a period, such as, "Please submit your reports by "close of day" Friday".
What is a more formal alternative to "close of day"?
A more formal alternative would be "end of the business day", which is appropriate in professional communication.
Is there a difference between "close of day" and "end of day"?
While they are often used interchangeably, "close of day" can imply the end of business operations, while "end of day" more broadly refers to the end of the 24-hour period.
What does "EOD" stand for, and how does it relate to "close of day"?
"EOD" stands for "end of day" and is an abbreviation commonly used in business to indicate a deadline that corresponds with the "close of day".
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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
89%
Authority and reliability
4.6/5
Expert rating
Real-world application tested