Nighttime vs Night Time: Which Spelling Is Correct?

• Nighttime is one word when you’re talking about the hours between evening and morning as a single concept — like “nighttime routine” or “nighttime noise.”

• Night time as two words is technically also used, but it’s far less common and mostly shows up in older or more formal writing..

What Does Nighttime Mean?

Nighttime works as both a noun and an adjective. As a noun, it names the period of darkness — “I love the quiet of nighttime.” As an adjective, it describes something that happens during that period — “a nighttime snack” or “nighttime driving.”

Nighttime as One Word

Dictionaries including Merriam-Webster list “nighttime” as a single word, both noun and adjective. This is the spelling you’ll see in news articles, product labels, and everyday writing.

Example Sentences Using Nighttime

• The city’s nighttime skyline is stunning.
• Her nighttime skincare routine takes ten minutes.
• Nighttime temperatures dropped below freezing.

More posts: Emasculate vs Demasculate: Which One Is Correct?

What Does Night Time Mean?

Night time written as two words isn’t wrong, but it’s the older, less streamlined version. Think of it the way “web site” eventually became “website” — the language simplified over the years.

Night Time as Two Separate Words

Some writers use “night time” when treating “night” and “time” as separate descriptive elements rather than one blended idea.

Example Sentences Using Night Time

• We arrived late at night time.
• The store closes at night time hours.

Nighttime vs Night Time

Feature	Nighttime	Night Time
Word count	One word	Two words
Part of speech	Noun and adjective	Mostly noun phrase
Common usage today	Very common	Rare, older style
Dictionary status	Standard entry	Not a standard headword
Best for	Everyday writing, marketing, journalism	Formal or legacy documents

Grammar Rule Behind the Difference

The rule comes down to compounding. When two words combine so often that they act as a single idea, dictionaries eventually merge them.

“Nighttime” passed that threshold decades ago, which is why grammar checkers and editors flag “night time” as the less preferred form.

More posts: Had vs Have vs Has: Difference and Use

Common Mistakes

• Night-time (hyphenated): Not standard. This hyphenated form shows up in British publications occasionally but isn’t the preferred spelling in most modern style guides.
• Nite time: This is informal slang, not a recognized spelling. Save it for texting, not writing.

Is Night-Time With a Hyphen Ever Correct?

Only in specific style guides that haven’t updated their conventions, or in British publications following older Oxford spelling rules.

Nighttime vs Night Time — Which Should You Use?

For nearly all writing — blogs, emails, business copy, resumes — nighttime is the clear choice. It reads cleaner, matches dictionary standards, and won’t trigger spell-check corrections.

Use “night time” only if you’re quoting older source material or deliberately matching a specific formal document style.

Conclusion

Nighttime is the standard, modern spelling for nearly every context — noun or adjective. Night time still exists but reads as outdated. When in doubt, write it as one word.

FAQs About Nighttime vs Night Time

Is nighttime one word or two?

Nighttime is one word in standard usage today, functioning as both a noun and adjective.

Is night time grammatically correct?

Yes, but it’s an older, less common form. Most modern writing uses “nighttime” instead.

What’s the difference between nighttime and night-time?

“Nighttime” is the standard one-word spelling; “night-time” with a hyphen appears mainly in British English and isn’t the preferred form elsewhere.

Can nighttime be used as an adjective?

Yes — as in “nighttime routine” or “nighttime driving,” describing something happening during the night.

Which spelling do style guides recommend?

Both AP and Chicago style guides list “nighttime” as one word for standard use.