As a Celt I have never come across this John.Not disputing it, but it wasn't something we celebrated when I was little.
Of course I haven't lived in Britain for a long time, but last year in Australia was the first time I saw all the costumes in the shops. Makes for great business I suppose.
I imagine you will be having a big party at your place. What's your address again. 🤣🤣🤣