Excellent!

Making a list that sticks to your word will be key. You told them only four or five days a year, so now you are somewhat stuck with that. I am sure you will get enough suggestions on valid Scottish/Irish holidays to wear it at least once a month if not more. Hit them up with that list though, and they might wonder what other details you underplayed or tried to sneak with.

St. Patricks Day, St. Andrews Day, Tartan Day for sure. Hogmanay gets you the work day closest before New Years too.