I saw this flag with a skull and a shamrock on it with the year 1762 under it. Teddy won’t let me post the pic or screenshot.
I thought that it was related to the IRA but found not connection between that date any anything related to Irish independence/The IRA.
Hi OP -- you're welcome to post a picture here, just not as its own post (that is, we only allow text posts). You can edit in an Imgur link to your question, or put it in the comments.
A reference to the first St. Patrick's day parade in New York in 1762? That is the only connection I can think of, there was no major event in Ireland itself. I'm seeing a lot of kitsch images online with with skulls, shamrocks, beer and the year 1762, lots of t shirts.