Every March, you might see people celebrating St. Patrick’s Day and using terms like “St Paddy” or “St Patty.” But many are unsure which one is correct. This confusion is common in both the UK and the US because the words sound similar but have different origins.
Understanding the correct usage is important, especially if you write social media posts, festive messages, or educational content. Using the wrong term can make your writing look unprofessional or simply incorrect.
In addition, learning the correct form helps you understand Irish culture and traditions better. Whether you live in London, Manchester, New York, or Boston, this knowledge ensures your St. Patrick’s Day greetings are accurate and respectful.
Quick Answer
The correct abbreviation for St. Patrick’s Day is “St Paddy.”
“St Patty” is often used incorrectly, especially in the US, because people confuse it with the common nickname “Patty” for Patricia. Therefore, if you want to be correct, use St Paddy, especially when referring to the Irish saint or the holiday.
Meaning of the Correct Form
St Paddy is short for St. Patrick, the patron saint of Ireland.
- Origin: The abbreviation “Paddy” comes from the Irish name Pádraig, which is Patrick in English.
- Usage: It is widely accepted in Ireland, the UK, and internationally.
- Example (UK): “We’re going to London’s St Paddy’s Day parade this weekend.”
- Example (US): “New York hosts a huge St Paddy’s Day celebration every March.”
Key points to remember:
- Paddy is Irish in origin.
- It refers specifically to St. Patrick or his day.
- Never confuse it with “Patty,” which is unrelated.
Meaning of the Incorrect Form
St Patty is a common mistake, especially in the US.
- Origin of the error: Many English speakers think “Patty” is a nickname for Patrick. Actually, “Patty” is a nickname for Patricia, the female name.
- Example (incorrect, US): “Happy St Patty’s Day!” (Incorrect because it refers to a female name rather than the saint.)
- Why it happens: The sound similarity between “Paddy” and “Patty” is misleading.
Key takeaway: Using St Patty is considered incorrect by language experts and traditional Irish sources.
Keyword Comparison / Key Differences

| Feature | St Paddy | St Patty |
| Correct form | ✅ Yes | ❌ No |
| Origin | Irish, from Pádraig | English, nickname for Patricia |
| Used in | UK, Ireland, US (correctly) | Mostly in US (incorrectly) |
| Meaning | Refers to St. Patrick | Confused with female name |
| Example sentence | “We wore green for St Paddy’s Day.” | “We wore green for St Patty’s Day.” (incorrect) |
UK vs US Notes:
- In the UK and Ireland, St Paddy is always correct.
- In the US, some people mistakenly write St Patty, but traditionalists consider it wrong.
Common Mistakes People Make
- Confusing Patty and Paddy
- Incorrect: “Happy St Patty’s Day!”
- Correct: “Happy St Paddy’s Day!”
- Misspelling the abbreviation
- “St Padi” or “St Paddie” – wrong spelling variations
- Correct: St Paddy
- Overusing St Patty in professional writing
- Businesses or schools using “St Patty” may appear careless.
- Assuming it’s a female holiday
- “Patty” is a female nickname; St. Patrick’s Day honors a male saint.
- Mixing UK and US conventions
- Even in the US, using St Paddy is correct. Using “St Patty” shows misunderstanding of Irish tradition.
Correct Usage in Sentences
Here are multiple examples to guide UK and US readers:
UK Examples:
- “I can’t wait for the St Paddy’s Day parade in Dublin.”
- “Wear green to celebrate St Paddy’s Day at school.”
- “We enjoyed Irish music during the St Paddy festivities.”
US Examples:
- “Chicago dyes its river green every St Paddy’s Day.”
- “Join the local pub for St Paddy’s celebrations.”
- “Even here in Boston, people love a big St Paddy’s Day parade.”
Incorrect examples (to avoid):
- “Happy St Patty’s Day!” ❌
- “We are going to the St Patty party.” ❌
Tips to Remember the Correct Usage
- Think Irish: “Paddy” is Irish.
- Avoid Patricia confusion: If it sounds like a girl’s name, it’s probably wrong.
- Mnemonic: “P for Patrick, Paddy for Patrick.”
- Check official sources: Irish government and cultural websites always use St Paddy.
- Read signs during March: Irish cities will never say “St Patty’s Day.”
FAQs
1. Is St Patty correct?
No. St Patty is considered incorrect because “Patty” is a nickname for Patricia, not Patrick.
2. Why do Americans say St Patty?
Many Americans mistakenly think “Patty” is a nickname for Patrick, leading to this common error.
3. Can I use St Paddy in the US?
Yes! It is correct worldwide, including the US, UK, and Ireland.
4. How do you pronounce St Paddy?
It is pronounced exactly like “St Pad-dee,” stressing the first syllable.
5. Is St Paddy only for St. Patrick’s Day?
Yes. The term is specifically linked to the saint and the holiday.
6. Are there official guidelines for this?
Yes, Irish cultural institutions and dictionaries recommend St Paddy, not St Patty.
7. Can you use St Patty informally?
Some Americans use it casually, but it is still technically incorrect. For formal writing, always use St Paddy.
Conclusion
In summary, the correct abbreviation for St. Patrick’s Day is St Paddy, derived from the Irish name Pádraig. Using St Patty is a common mistake, especially in the US, but it should be avoided in professional or educational contexts.
Remember:
- St Paddy = correct, Irish origin, refers to the saint
- St Patty = incorrect, confusing, derived from a female nickname
By following these tips and examples, you can confidently write St Paddy’s Day greetings, posts, or articles. Celebrate correctly, respect tradition, and impress your audience in both the UK and the US!
Call-to-action: Next time you write about St. Patrick’s Day, use St Paddy and spread the knowledge to others who may still be confused.

I am Julian Parker, a passionate grammar enthusiast and content writer dedicated to making English rules simple and easy to understand. I specialize in breaking down complex grammar topics into clear, practical explanations. I enjoy helping readers improve their writing skills with confidence. My goal is to make learning grammar engaging, simple, and accessible for everyone.








