on or before

USAGE SUMMARY

"on or before" is correct and usable in written English.
You can use it when you are specifying a particular date or deadline that must be met. For example, "Please submit your application on or before June 15th."

✓ Grammatically correct

News & Media

Science

Wiki

Human-verified examples from authoritative sources

Exact Expressions

57 human-written examples

Companies will be admitted on, or before, September 30 , 2017

TechCrunch

A meeting was held on Tuesday night, where a decision was put off until "on or before" 17 August.

BBC

The date will now likely be "on or before July 1".

Vice

The present analyses include all participants due for one-year follow-up on or before 31 December 2003.

Clinical interventions in aging

The retirements would be effective on or before Aug. 31.

The New York Times

And was it mailed on or before Election Day?

The New York Times

It is expected to close on or before Sept. 7.

The New York Times

The winner will be notified by e-mail on or before Saturday 10 November 2007.

The Guardian - Arts

The judges will select the winning entry on or before 31 July 2015.

The Guardian

Human-verified similar examples from authoritative sources

Similar Expressions

2 human-written examples

Conditions in which waves broke on or just before the specimen caused maximum impulsive pressures.

Coastal Engineering

Ideally this computer will be always on, or on before other computers connect.

WikiHow

Expert writing Tips

Best practice

When setting deadlines, use "on or before" to clearly communicate that earlier submissions or actions are also acceptable. This can encourage promptness.

Common error

Avoid using "on or before" when the timeframe is already implicitly inclusive. For example, instead of "Applications accepted on or before the deadline date," say "Applications accepted by the deadline date."

Linguistic Context

The phrase "on or before" functions as a prepositional phrase that modifies a noun or verb, indicating a time limit or deadline. It specifies that an action or event must occur at or before a certain date or time. Ludwig provides numerous examples demonstrating this function.

Expression frequency: Very common

Frequent in

News & Media

61%

Science

21%

Wiki

3%

Less common in

Formal & Business

1%

Academia

0%

Encyclopedias

0%

Ludwig's WRAP-UP

In summary, the phrase "on or before" is a common and grammatically correct way to indicate a deadline, according to Ludwig. It's suitable for various contexts, including news, science, and general communications. When using this phrase, ensure you are setting clear expectations and avoid redundancy. Ludwig AI indicates that the phrase is well-understood and frequently used, making it a reliable choice for specifying timeframes. Related alternatives include "no later than" and "by", offering simpler ways to convey the same meaning.

More alternative expressions

Phrases that express similar concepts, ordered by semantic similarity:

no later than

Indicates the latest possible time or date for something to happen. It is more direct and emphasizes the deadline.

before or at

Mirrors the original phrase but slightly changes the word order.

by

A shorter and more common way to express a deadline.

prior to

Emphasizes that something must happen before a specific time, without necessarily including that time.

up to and including

Specifies a range of time, emphasizing that the end date is included.

at the latest

Highlights the finality of the deadline.

not after

Similar to "no later than" but can sound slightly more formal.

until

Indicates a period leading up to a specific date or time.

up until

Similar to "until" but with a slightly stronger emphasis on the timeframe.

sooner than or at

Highlights the possibility of something happening before the specified time.

FAQs

How do I use "on or before" in a sentence?

Use "on or before" to indicate a deadline. For example, "Please submit your application "on or before" January 1st."

What is a simpler way to say "on or before"?

You can use alternatives like "by", "no later than", or "prior to" depending on the context.

Is it redundant to use "on or before" with a specific date?

No, it's not redundant. Using "on or before" clarifies that submissions or actions taken before the specified date are also acceptable.

What's the difference between "on or before" and "after"?

"On or before" sets the latest possible date, while "after" indicates a time period following a specific date. For example, "on or before July 1st" means anytime up to and including July 1st, whereas "after July 1st" means any time following July 1st.