out of hours

USAGE SUMMARY

The phrase "out of hours" is correct and usable in written English.
It is used to refer to times outside of normal working hours, and usually implies that an organization or service is not available during this time. For example: "The company only offers customer support services out of hours, between 6 p.m. and 10 p.m."

✓ Grammatically correct

Science

News & Media

Professional

Human-verified examples from authoritative sources

Exact Expressions

12 human-written examples

That's mainly an out of hours setting.

BMC Health Services Research

After the establishment of the GPC, 1990 out of 2278 patients (90%) utilized out of hours primary care instead of out of hours emergency care [ 13].

BMC Family Practice

Limitations of the study include possible selection bias as participation was out of hours and voluntary.

BMC Medical Education

And out of hours?

Independent

For me, eating out of hours can take other forms.

Independent

Low levels of clinical cover - especially out of hours.

BBC

Human-verified similar examples from authoritative sources

Similar Expressions

48 human-written examples

There were deficiencies noted in the out-of-hours rotas for GI bleeding, with 27% of hospitals not having a dedicated-out-of hours GI bleeding service.

Gut

We investigated opinions on: overall satisfaction with the GP cooperative for out-of-hours, reorganisation of out-of-hours care, perceived workload, out-of-hours care as being an essential part of primary care, anonymity of care, gatekeeper function, availability of patient dossiers, cooperation with medical specialists during out-of-hours, and safety.

BMC Health Services Research

Out-of-hours, decisions to consult were influenced by opinions regarding out-of-hours services.

BMC Family Practice

Problems reported out-of-hours most commonly resulted in advice to visit an out-of-hours centre and in-hours advice to contact a general practitioner.

BMJ Open

Problems reported out-of-hours most commonly resulted in advice to visit an out-of-hours centre and in-hours resulted in advice to contact a GP.

BMJ Open

Expert writing Tips

Best practice

Always hyphenate the phrase as "out-of-hours" when it is used as a compound adjective preceding a noun, such as "an out-of-hours service".

Common error

Avoid omitting the hyphens when "out of hours" is modifying a noun directly. Writing "out of hours GP" is considered a punctuation error in formal writing; it should be "out-of-hours GP".

Linguistic Context

In linguistic terms, "out of hours" functions as a prepositional phrase. According to Ludwig AI, it frequently serves an adverbial role (modifying how or when a verb occurs) or an adjectival role (describing a noun). The latter typically requires hyphenation in formal contexts.

Expression frequency: Common

Frequent in

Science & Medicine

55%

News & Media

30%

Formal & Business

15%

Less common in

Social Media

5%

Reference

3%

Wiki

2%

Ludwig's WRAP-UP

The phrase "out of hours" is a highly versatile and correct expression in English writing. Based on data from Ludwig, it is most frequently encountered in healthcare and public service contexts to describe operations occurring outside standard 9-to-5 schedules. A key takeaway for writers is the punctuation distinction: use hyphens when the phrase precedes a noun (e.g., "an out-of-hours appointment") and omit them when it functions as an adverb (e.g., "he worked out of hours"). Its prevalence in authoritative sources like the BBC and various scientific journals confirms its status as a reliable professional term. Whether you are writing a medical report or a business email, "out of hours" serves as a clear and concise way to define non-standard timeframes.

More alternative expressions

Phrases that express similar concepts, ordered by semantic similarity:

after hours

More common in American English business contexts

outside working hours

Provides a more explicit reference to labor schedules

beyond office hours

Specifically refers to the timeframe of an office setting

outside of business hours

A more formal and slightly longer variation

anti-social hours

Describes shifts during times when others are typically social or sleeping

post-work hours

Focuses on the period immediately following the workday

overtime

Refers to the work done during extra hours rather than just the time period

on-call

Specifically refers to being available for emergency work

night shifts

A specific type of schedule occurring during the late evening or night

off-peak hours

Used more in utility or travel contexts to describe low-demand periods

FAQs

How do I use "out of hours" in a sentence?

You can use it to describe an activity happening outside normal times, for example: "I enjoy running <a href="/s/out+of+hours" target="_blank" rel="alternative">out of hours during the day."

What is the difference between "out of hours" and "after hours"?

While both mean similar things, "<a href="/s/after+hours" target="_blank" rel="alternative">after hours" is more common in the US, whereas "out of hours" is the standard term in British English, especially for medical services.

Should "out of hours" be hyphenated?

It depends on its position. If it is used as an adjective before a noun, use <a href="/s/out-of-hours" target="_blank" rel="alternative">out-of-hours. If it stands alone as an adverbial phrase, do not hyphenate it.

What can I say instead of "out of hours" in a professional email?

Depending on the context, you might use "<a href="/s/outside+of+business+hours" target="_blank" rel="alternative">outside of business hours" or "<a href="/s/beyond+core+hours" target="_blank" rel="alternative">beyond core hours" for more formal clarity.