Have you ever written 12nd when typing a date like December 12 or September 12? Many people make this mistake. That is why thousands of users search questions like “Which is correct, 12th or 12nd?”, “Is it correct to say 12th?”, and “Is it 12th or 12nd day?”.
The confusion happens because English ordinal numbers use endings like st, nd, rd, and th. For example, we write 2nd and 3rd, so some people think 12 → 12nd. However, English grammar has a special rule for numbers such as 11, 12, and 13.
These numbers always use “th.”
Because of this rule, the correct form is 12th, not 12nd. You will see 12th used in many situations such as writing dates, building floors, school grades, and event schedules.
This guide explains the correct spelling, the grammar rule behind it, common mistakes, and real examples so you never confuse 12th or 12nd again.
12th or 12nd means
The correct form is 12th.
12nd is incorrect and not used in English grammar.
Examples
✔ 12th day
✔ 12th floor
✔ February 12th
Incorrect examples:
❌ 12nd day
❌ 12nd floor
❌ December 12nd
So if you ask “12th or 12nd which is correct?”, the answer is simple:
✔ 12th is correct
❌ 12nd is wrong
Common questions:
- Is it 12th or 12nd day? → 12th day
- Is it 12th floor or 12nd floor? → 12th floor
- Is it correct to say 12th? → Yes.
Important Grammar Rule
Numbers 11, 12, and 13 always end with “th.”
Correct:
- 11th
- 12th
- 13th
Incorrect:
- ❌ 11st
- ❌ 12nd
- ❌ 13rd
This rule explains why 12nd is never correct.
The Origin of 12th or 12nd
The word 12th is an ordinal number. Ordinal numbers show position or order in a list.
Examples:
| Number | Ordinal |
|---|---|
| 1 | 1st (first) |
| 2 | 2nd (second) |
| 3 | 3rd (third) |
| 4 | 4th (fourth) |
However, English has special forms for numbers ending in 11, 12, and 13.
Correct forms:
- 11th
- 12th
- 13th
Incorrect forms:
- ❌ 11st
- ❌ 12nd
- ❌ 13rd
That is why people sometimes search confusing phrases like:
- 11th or 12nd
- 13th or 12nd
- 13th or 13rd
But the correct versions are always:
✔ 11th
✔ 12th
✔ 13th
British English vs American English Spelling
There is no difference in spelling between British and American English.
Both styles use 12th.
The only difference is how dates are written.
| Style | Example |
|---|---|
| American English | September 12th |
| British English | 12th September |
| Incorrect | 12nd September |
Examples:
- September 12th or 12nd → September 12th
- November 12th or 12nd → November 12th
- December 12th or 12nd → December 12th
So the spelling 12th stays the same everywhere.
Which Spelling Should You Use?
If you are writing in English, always use 12th.
Correct date examples
- January 12th
- February 12th
- March 12th
- April 12th
- May 12th
- June 12th
- July 12th
- August 12th
- September 12th
- October 12th
- November 12th
- December 12th
Common searches include:
- January 12th or 12nd
- February 12th or 12nd
- April 12th or 12nd
- June 12th or 12nd
- July 12th or 12nd
- August 12th or 12nd
All correct versions use 12th.
12th or 12nd Common Mistakes
Here are mistakes people often make.
| Incorrect | Correct |
|---|---|
| 12nd | 12th |
| 12nd day | 12th day |
| 12nd floor | 12th floor |
| December 12nd | December 12th |
| 13rd | 13th |
Examples:
❌ 12nd or 12th December
✔ 12th December
❌ October 12nd
✔ October 12th
❌ November 12nd
✔ November 12th
These mistakes happen because people apply the 2 → nd rule incorrectly.
12th or 12nd Everyday Examples
You will see 12th used in many situations.
Emails
The meeting will take place on March 12th.
News writing
The conference starts on October 12th.
Social media
My birthday is August 12th 🎉
Formal writing
The report was submitted on December 12th.
Common search phrases include:
- 12th or 12nd date
- 12nd or 12th September
- December 12th or 12nd
- November 12th or 12nd
The correct form is always 12th.
12th or 12nd Google Trends & Usage Data
Thousands of people search this grammar question every month.
Popular searches include:
- is it 12th or 12nd
- 12th or 12nd which one is correct
- 12nd or 12th december
- 12nd or 12th november
- 12nd or 12th september
These searches are common in:
- Pakistan
- India
- United States
- United Kingdom
- Philippines
People usually search this when writing:
- dates
- school grades
- building floors
- event schedules
Because of the confusion between nd and th endings, many learners accidentally write 12nd.
12th or 12nd Comparison Table
| Phrase | Correct Form |
|---|---|
| 12th or 12nd day | 12th day |
| 12th floor or 12nd floor | 12th floor |
| September 12th or 12nd | September 12th |
| November 12th or 12nd | November 12th |
| December 12th or 12nd | December 12th |
Ordinal Number Comparison Table
| Number | Correct | Incorrect |
|---|---|---|
| 11 | 11th | 11st |
| 12 | 12th | 12nd |
| 13 | 13th | 13rd |
| 21 | 21st | 21th |
| 22 | 22nd | 22th |
| 23 | 23rd | 23th |
This table clearly shows that 12nd is never correct.
Related Grammar Topics
If you want to learn more about ordinal number rules, you can also explore related topics such as:
- 11th or 11st – Which Is Correct?
- 13th or 13rd – Grammar Rule Explained
- 21st or 21th – Correct Ordinal Form
These grammar topics follow similar rules and help improve your English writing.
FAQs
Which is correct, 12th or 12nd?
12th is correct.
12nd is incorrect.
Is it 12th or 12nd day?
The correct phrase is 12th day.
Is it 12th floor or 12nd floor?
The correct phrase is 12th floor.
Is it correct to say 12th?
Yes. 12th is the correct ordinal form of twelve.
Should I write September 12th or 12nd?
The correct form is September 12th.
How do you write December 12 correctly?
Correct:
- December 12
- December 12th
Incorrect:
- ❌ December 12nd
Why do people write 12nd?
People think the 2 → nd rule applies to 12. However, 11, 12, and 13 always use “th.”
Conclusion
The confusion between 12th or 12nd is common, especially when writing dates, floors, or ordinal numbers. Many people assume that because 2 becomes 2nd, the number 12 should become 12nd. However, English grammar follows a different rule for numbers 11, 12, and 13.
The correct forms are 11th, 12th, and 13th, and they always end with “th.” Because of this rule, 12nd is never correct in standard English.
You will see 12th used in many everyday situations such as 12th day, 12th floor, or dates like September 12th and December 12th. Whether you follow American date style (September 12th) or British style (12th September), the ordinal spelling remains 12th.
A simple rule to remember is:
11 → 11th
12 → 12th
13 → 13th
Once you remember this rule, you will never make the mistake of writing 12nd again. Using the correct form makes your writing clear, professional, and grammatically accurate.
“May Sinclair, a playful wordsmith at PunsBlast, turning clever puns and witty humor into daily laughs that brighten readers’ days.”
