Saint Patrick’s or St. Patrick’s? Paddy or Patty?

Wherever you go and whatever you do, may the luck of the Irish be there with you.  —Irish blessing

March 17 is St. Patrick’s Day, and for the past few days we’ve been busy getting our St. Patrick’s Day materials ready for ESL Library and Sprout English, our sister site for young learners. As I was editing our older material, I had to decide whether to spell this holiday as Saint or St. Patrick’s Day. Also, I had to find out if this holiday’s nickname should be spelled Paddy or Patty. I found the answers interesting, so I thought I’d share them with my fellow English-language lovers!

Saint or St.?

Both Saint Patrick’s Day and St. Patrick’s Day are correct, but which is more common? The Chicago Manual of Style states that both are possible, and to choose one form and be consistent. The next thing I did was to look up both variations in Merriam-Webster’s Dictionary of Current English, since that is the dictionary we follow in our style guideMW’s had an entry for Saint Patrick’s Day, but not for St. Patrick’s Day, even though they list other saints as St. (St. Denis, for example). But after talking to the rest of the team and realizing we all grew up seeing St. Patrick’s Day, I decided to run a Google Ngram on these two terms to find out which was more common in literature.

Clearly, St. Patrick’s Day is more common in literature, so that’s what we decided to stick with in our materials! A quick check confirmed that St. Patrick’s Day also appears far more often on the web.

Note: Don’t forget that the word Day is always capitalized in holiday names!

Paddy or Patty?

Before I did some digging for this blog post, I assumed that Patty was the correct spelling of St. Patrick’s nickname, and that people wrote Paddy in error (because /t/ is always pronounced /d/ between two vowels…think of how you say water). But this is NOT the case! Paddy is correct, because it is based on the Irish boy’s name Pàdraig (the English version is Patrick). I learned that the Irish dislike when people write Patty (this is short for Patricia, a girl’s name), so be sure to spell it Paddy and St. Paddy’s Day from now on. Thanks to for their humorous summary of these rules!

St. Patrick’s Day Resources:

ESL Lesson Plans and Resources for Teaching about St. Patrick’s Day and Luck: Find a Lucky Idioms poster, beginner & intermediate lesson plans, podcasts, flashcards, and more!

Happy St. Paddy’s Day!



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    Karen Oliveira says:

    Mar 17, 2015 at 2:44 pm

    Thank you for this information. It is intresting. Although we always played St. Patrick´s Day at school by dressing up and such, I knew very little about it so I have been doing some research too.


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