Have you ever typed “call me anyday” in a text message and then paused, wondering if that’s actually a word? You’re not the only one. This tiny spacing question shows up everywhere — in emails, marketing copy, social media captions, and even published articles — and it trips up native speakers just as often as English learners.
The confusion makes sense. English already has words like “everyday” and “anytime” that combine into single words, so it’s natural to assume “any day” follows the same rule. It doesn’t. In this guide, you’ll get a clear, no-fluff answer on which form is correct, why the confusion exists in the first place, and how to use “any day” vs “anyday” properly in every kind of writing — from casual texts to formal reports.
Quick Answer
“Any day” (two words) is the grammatically correct form. It functions as a noun phrase referring to an unspecified day or “whenever you like.” “Anyday” (one word) is not a standard English word. It doesn’t appear in Merriam-Webster, Oxford, or any major dictionary, and most style guides and grammar checkers flag it as an error. You may see “anyday” used informally online or as a stylized brand name, but in emails, essays, articles, and professional communication, “any day” is always the safer and correct choice.
Any Day vs Anyday: What’s the Difference?
The core difference comes down to spelling status and grammatical function. “Any day” is a standard, dictionary-recognized phrase made of the determiner “any” plus the noun “day.” “Anyday” is a nonstandard spelling that has never been formally accepted into English, even though people write it out of habit or convenience.
Is “Anyday” or “Any Day” Correct?
“Any day” is correct. “Anyday” is considered a misspelling in virtually every context, whether you’re writing British English or American English. Unlike word pairs such as “everyday” and “every day,” which are both legitimate but serve different grammatical roles, “any day” has no accepted one-word counterpart. There is only one correct spelling here, and it’s two words.
Key Difference at a Glance
| Feature | Any Day (Correct) | Anyday (Incorrect) |
| Dictionary status | Recognized standard phrase | Not found in major dictionaries |
| Grammar role | Noun phrase / adverbial phrase | Nonstandard spelling |
| Formal writing | Always appropriate | Should be avoided |
| Common usage | Emails, articles, conversation | Occasional casual texts, branding |
| British & American English | Accepted in both | Not accepted in either |
Meaning of “Any Day”
What Does “Any Day” Mean?
“Any day” means at any time, whenever you choose, or without a fixed schedule. It signals flexibility — the speaker isn’t tied to one particular date or moment. For example, “You can drop by any day next week” tells the listener there’s no single required day; any one will work.
Any Day Meaning in English
In standard English, “any day” is a flexible time expression. It combines “any,” a determiner used to refer to one unspecified member of a group, with “day,” the noun it modifies. Together, they describe an unspecified point within a range of days, similar in structure to phrases like “any time” or “any place.” According to Oxford’s Lexico dictionary, “any day” is an informal phrase that means “at any time or under any circumstances.”
Any Day This Week Meaning
When someone says “any day this week,” they’re narrowing the flexibility to a specific range — the current seven-day period — while still leaving the exact day open. It’s commonly used in scheduling contexts: “I’m free any day this week except Thursday.”
Any Time, Any Day Meaning
“Any time, any day” doubles down on openness, meaning there’s no restriction on hour or date. It’s often used to express strong availability or commitment, such as “Call me any time, any day if you need help.”
Examples in British English (UK)
- “We could meet any day next week, whichever suits you.”
- “The shop is open any day except bank holidays.”
- “She said she’d be happy to help any day of the week.”
Examples in American English (US)
- “I can reschedule the appointment any day this month.”
- “He told me he’d beat that record any day.”
- “Feel free to visit any day between nine and five.”
Different Contexts of Usage
“Any day” adapts to several everyday situations:
- Scheduling: “Pick any day that works for your team.”
- Confidence or preference: “I’d choose homemade food over takeout any day.”
- Uncertainty about timing: “The package could arrive any day now.”
- Comparisons: “This coffee beats that brand any day.”
Is “Anyday” a Real Word?
No. “Anyday” is not recognized as a standard word by Merriam-Webster, Oxford, or Cambridge dictionaries. While language does evolve — “everyday” and “anytime” both started as two-word phrases before becoming accepted compounds — “anyday” hasn’t followed that same path and shows no strong signs of becoming standard anytime soon.
Why Do People Write “Anyday”?
A few habits explain the mix-up:
- Pattern matching with “everyday” and “anytime”: since those words merged, people assume “any day” should too.
- Autocorrect and predictive text: some keyboards suggest “anyday” based on user typing patterns rather than grammar rules.
- Speech blending into writing: in fast conversation, “any day” sounds like one word, and that pronunciation habit carries over into typing.
- Character limits: on platforms like social media, users sometimes drop the space to save room.
Where You May See “Anyday”
You might spot “anyday” in casual texts, social media captions, or even brand names and product titles, where companies use it as a stylistic choice rather than a grammatical one. Occasionally, it slips into published articles as a simple typo. None of these uses make it standard English.
Should You Use “Anyday” in Writing?
Avoid it. Even in informal writing, “anyday” risks looking like a mistake to careful readers, editors, and hiring managers. If you want your writing to feel polished, stick with “any day” across every context — texts, emails, resumes, and professional documents alike.
Any Day vs Anyday: Grammar Rules
Why “Any Day” Is Grammatically Correct
“Any day” works because “any” is a determiner modifying the noun “day,” forming a standard noun phrase. This structure mirrors countless other English phrases like “any time,” “any place,” and “any way” — none of which have accepted closed-compound forms in standard usage.
Any Day vs Anyday Grammar Explained
A simple test helps confirm correctness: try replacing “any day” with “some day” or “on a day.” If the sentence still makes sense, the two-word form is correct. “I can visit you any day” becomes “I can visit you on some day” — the meaning holds, confirming “any day” is right.
Comparison with “Anytime” vs “Any Time”
“Anytime” (one word) is an accepted adverb meaning “whenever,” as in “Call anytime.” “Any time” (two words) is used when “time” functions as a noun being modified, often followed by “that,” as in “any time that works for you.” Both forms of “anytime/any time” are standard — unlike “any day,” which has no accepted one-word version.
Comparison with “Everyday” vs “Every Day”
“Everyday” is an adjective describing something ordinary or routine, like “everyday shoes” or “an everyday occurrence.” “Every day” is a two-word phrase meaning “each day,” used adverbially: “I walk every day.” Just as you write “I exercise every day” and not “everyday,” you should write “I could visit any day” and not “anyday.” The key distinction is that “everyday” legitimately exists as a one-word adjective, while “anyday” doesn’t have that same accepted status.
Any Day vs Anyday Meaning
Meaning Comparison Table
| Term | Meaning | Valid English Word? | Example |
| Any day | At any unspecified time; whenever | Yes | “Stop by any day this week.” |
| Anyday | Intended to mean “any day,” but nonstandard | No | “Stop by anyday” ❌ |
| Everyday | Ordinary, routine, daily (adjective) | Yes | “These are my everyday shoes.” |
| Every day | Each day, without exception (adverbial phrase) | Yes | “I read every day.” |
Key Takeaways
- “Any day” is always two words in standard English.
- “Anyday” has no dictionary backing and should be treated as an error.
- The meaning of “any day” stays consistent across British and American English.
- Confusing it with “everyday” happens because that word pair actually does split into two valid forms.
Any Day or Anyday: Sentences, Examples & Usage
Daily Conversation Examples
- “You can come over any day this weekend.”
- “I’d pick pizza over salad any day.”
- “She might call any day now.”
Professional Examples
- “Please let us know if any day next week works better for the meeting.”
- “Our support team is available any day, Monday through Friday.”
- “The deadline could shift any day depending on client feedback.”
UK Style Examples
- “We’re open any day except Christmas.”
- “You’re welcome to pop round any day, really.”
US Style Examples
- “The store restocks any day of the week.”
- “I’ll take a rain check any day this month.”
Formal Writing Examples
- “Applicants may submit documentation any day within the review period.”
- “The committee will reconvene any day the quorum is met.”
Casual Writing Examples
- “Text me any day, I’m usually free.”
- “Honestly, beach days beat office days any day.”
Incorrect Examples to Avoid
- ❌ “Come by anyday you like.”
- ❌ “This could happen anyday now.”
- ❌ “I’m free anyday this week.”
Each of these should replace “anyday” with “any day” to be grammatically correct.
Common Mistakes People Make
Writing “Anyday” as One Word
This is the most frequent error, usually driven by habit, autocorrect, or confusion with “everyday.” The fix is simple: always use two words.
Confusing “Everyday” with “Any Day”
Because “everyday” is a legitimate single word, some writers assume “any day” should follow the same rule. Remember: “everyday” describes something routine, while “any day” refers to an unspecified point in time — they aren’t interchangeable in either meaning or spelling.
Using “Anyday” in Formal Writing
Emails, reports, resumes, and academic papers should never include “anyday.” It signals carelessness to readers and editors who know the correct form.
Copying Informal Social Media Usage
Just because a caption or comment uses “anyday” doesn’t mean it’s acceptable elsewhere. Social platforms are full of casual shorthand that doesn’t hold up in professional or academic writing.
Mixing Different Meanings
Some writers blur “any day” (a time expression) with unrelated uses of “day,” leading to awkward or unclear sentences. Keep the phrase tied specifically to flexible timing.
Tips to Remember the Correct Usage
Think of “Any Day” as Two Words
Train yourself to see “any” and “day” as separate building blocks, just like “any place” or “any way.” There’s no merged version to fall back on.
Replace It with “Any Time”
If a sentence sounds right with “any time” swapped in, “any day” (two words) will also be correct in that same slot.
Remember That Not All Words Combine
English doesn’t merge every determiner-noun pair into a compound word. “Everyday” merged; “any day” didn’t. Treat each pair individually rather than assuming a universal pattern.
Use the Test Sentence Trick
Replace “any day” with “some day” or “on a day.” If the sentence still makes sense, you’ve confirmed the two-word form is correct.
Follow Standard English Grammar
When in doubt, rely on established grammar rules and trusted dictionaries rather than autocorrect or casual online writing. A quick check with a resource like Oxford’s dictionary or Merriam-Webster settles the question instantly.
Conclusion
The rule is simple once you see it clearly: “any day” is always two words, and “anyday” isn’t standard English, no matter how often it shows up online or in casual texts. Unlike “everyday” and “every day,” which both have legitimate but distinct roles, “any day” has just one correct spelling to remember. Whether you’re writing a quick text, a professional email, or a formal report, sticking with “any day” keeps your writing accurate and polished — every day, and any day.
If you enjoyed clearing up this mix-up, you’ll likely run into similar spacing questions elsewhere in English. Residence Hexa’s guide on Company-Wide or Companywide tackles the same open-compound-versus-closed-compound confusion, while When I Can or When Can I breaks down another everyday phrase that trips up even confident writers.
