Anyday or Any Day: Which One Is Correct?

Anyday or any day? The correct form is any day in almost every situation. It is a two-word phrase that means on any day or whenever. Anyday is rarely accepted in standard English and is considered incorrect by most dictionaries, grammar checkers, and style guides.

Many English learners and even native speakers confuse these spellings because they sound the same in conversation. This guide explains the difference, the history behind the phrase, British and American English usage, pronunciation, common mistakes, and real-life examples so you can use the correct spelling with confidenc

Table of Contents

Quick Answer

The correct spelling is any day.

✅ Any day = Correct in Standard English.
❌ Anyday = Generally considered incorrect in formal writing.

Examples

✅ You can visit me any day next week.
✅ I’m available any day after lunch.
❌ You can visit me anyday next week.

Whether you’re writing an email, blog, academic paper, or business message, any day is the preferred spelling.

The Origin of Anyday or Any Day

The phrase any day has been part of the English language for centuries. It combines the determiner any with the noun day, meaning no matter which day or on whatever day is convenient. Because both words keep their own meaning, standard grammar treats them as two separate words.

The one-word form anyday appeared occasionally in informal writing, advertisements, and online posts. However, major dictionaries such as Merriam-Webster, Cambridge Dictionary, and the Oxford English Dictionary recognize any day as the standard form for this meaning. Modern style guides, editors, and proofreading tools also recommend writing it as two words.

The confusion exists because English contains many compound words that changed over time, such as today, tonight, and everyday (as an adjective). Many writers assume any day has followed the same pattern, but it has not.

British English vs American English Spelling

Unlike words such as colour/color or licence/license, there is no spelling difference between British English and American English for this phrase.

Both varieties of English use any day when referring to an unspecified day or time.

British English	American English	Correct?	Example
any day	any day	✅ Yes	I can meet you any day this week.
anyday	anyday	❌ No	Not recommended in standard English.

Examples

Context	British English	American English
Business email	I’m available any day next week.	I’m available any day next week.
Academic writing	Submit the assignment any day before Friday.	Submit the assignment any day before Friday.
Daily conversation	Call me any day.	Call me any day.

Whether you follow British English, American English, or another variety of Standard English, any day is the correct choice.

Pronunciation of Anyday or Any Day

Both anyday and any day are pronounced the same in speech.

Pronunciation: /ˈeni deɪ/
Sounds like: EN-ee DAY

Since there is no pronunciation difference, listeners cannot tell which spelling you mean. The difference only appears in writing.

Examples

“You can stop by any day.”
“I’m free any day after work.”

This is why many people make spelling mistakes. They write the phrase exactly as they hear it. A grammar checker, spell checker, or careful proofreading can help catch this error before you publish or send your writing.

Why People Confuse Anyday or Any Day

Several reasons make this phrase confusing for English learners and native speakers alike.

Both forms sound exactly the same.
English has many genuine compound words, so writers expect this to be one too.
Informal posts on social media often use anyday, encouraging others to copy it.
Fast typing and autocorrect sometimes hide the mistake.
Many people never learn the grammar rule behind the phrase.

Because of these factors, word choice errors are common in content writing, creative writing, email writing, and casual online communication. However, professional writing, academic writing, and business writing should always use any day.

Which Spelling Should You Use?

The answer depends less on your audience and more on standard English grammar.

Choose any day in almost every situation because it is accepted by dictionaries, editors, and writing professionals.

Audience	Recommended Spelling	Reason
American English	Any day	Standard usage in the US
British English	Any day	Standard usage in the UK
Canadian English	Any day	Preferred by style guides
Australian English	Any day	Used in formal and informal writing
Academic Writing	Any day	Required for correct grammar
Business Writing	Any day	Professional and clear
Global English	Any day	Understood and accepted worldwide

If you’re writing for an international audience, any day is the safest and most professional choice. Whether it’s an email, report, blog post, or technical document, using the two-word phrase ensures your writing follows Standard English.

Common Mistakes with Anyday or Any Day

Many writers accidentally use anyday because they assume it follows the pattern of words like today or everyday. The following table shows the most common errors.

Incorrect	Correct
I’ll come anyday.	I’ll come any day.
You can call me anyday.	You can call me any day.
We are available anyday this month.	We are available any day this month.
Feel free to visit anyday.	Feel free to visit any day.

Tips to Avoid Mistakes

Remember that day is still a separate noun.
Use a trusted grammar checker or spell checker before publishing.
Proofread emails and important documents carefully.
When in doubt, write any day as two words.

Anyday or Any Day in Everyday Examples

Seeing the phrase in real situations makes it easier to remember.

Email

I’m available any day next week. Please let me know what works best for you.

Business Writing

The meeting can be scheduled any day before the project deadline.

News

Residents may visit the information center any day during normal business hours.

Social Media

I’m free any day this weekend. Let’s plan something!

Academic Writing

Students may submit the assignment any day before Friday without penalty.

Daily Conversation

You can stop by any day.
Call me any day after 6 p.m.
We can start any day you like.

These examples show that any day works naturally in formal writing, informal writing, digital communication, content writing, and everyday speech.

Easy Trick to Remember Anyday or Any Day

A simple memory trick can help you avoid this mistake forever.

Think about the meaning.

If you can replace the phrase with “on any single day”, then you should write any day as two words.

Example

You can visit on any single day.
✅ You can visit any day.

Another Easy Rule

Any describes day.
Since day is a noun, the two words stay separate.

Remember this sentence:

If you mean “whenever,” write “any day”—never “anyday.”

This mnemonic works well for English learners, students, bloggers, and anyone who wants to improve their writing skills.

Anyday or Any Day – Google Trends & Usage Data

Search interest in “anyday or any day” has grown as more people use grammar checkers and search for the correct spelling before writing emails, blog posts, or academic assignments.

Here are the general usage trends:

United States: Any day is the standard spelling in schools, businesses, newspapers, and professional writing.
United Kingdom: Writers also prefer any day in accordance with British English grammar.
Canada: Canadian English follows the same rule and recommends any day.
Australia & New Zealand: Any day is the accepted spelling in formal and everyday writing.
Global English: English learners frequently search for “anyday or any day” because both forms sound identical, creating spelling confusion.

Usage Comparison

Keyword Variation	Standard English	Dictionary Accepted	Recommended
Any day	✅ Yes	✅ Yes	⭐ Best Choice
Anyday	❌ No	❌ Generally No	Not Recommended

Overall, any day is overwhelmingly more common in academic writing, business communication, content writing, news articles, and professional editing.

Comparison Table

Feature	Any Day	Anyday
Correct spelling	✅ Yes	❌ No
Standard English	✅ Yes	❌ No
British English	✅ Yes	❌ No
American English	✅ Yes	❌ No
Accepted by dictionaries	✅ Yes	❌ Generally No
Suitable for academic writing	✅ Yes	❌ No
Suitable for business writing	✅ Yes	❌ No
Suitable for emails	✅ Yes	❌ No
Suitable for blogs	✅ Yes	❌ No
Recommended by grammar checkers	✅ Yes	❌ No

FAQs

Is anyday one word or two words?

The correct form is any day as two words. Anyday is generally considered incorrect in standard English.

Can I use anyday in formal writing?

No. Formal writing, including academic papers, business emails, and professional documents, should always use any day.

Do British and American English use different spellings?

No. Both British English and American English use any day.

Why do people write anyday?

People often write anyday because both spellings sound the same when spoken, and English contains many genuine compound words like today and tonight.

Is anyday listed in dictionaries?

Major dictionaries and style guides recommend any day for the meaning “on any day” or “whenever.”

How can I remember the correct spelling?

Think of day as a separate noun. If you mean “on any day,” write any day as two words.

Can grammar checkers detect this mistake?

Yes. Most modern grammar checkers, spell checkers, and proofreading tools flag anyday and suggest any day instead.

Conclusion

Choosing between anyday or any day is simple once you know the grammar rule. Any day is the correct and widely accepted spelling in British English, American English, and other forms of Standard English. It appears in dictionaries, style guides, academic writing, business communication, and everyday conversation.

Although anyday may appear online or in informal posts, it is not recommended for professional or formal writing. Whenever you mean “on any day” or “whenever,” write the phrase as two words. Following this simple rule will improve your writing, help you avoid common spelling mistakes, and make your communication clearer and more professional.