When you listen to many Irish singers, they will pronounce "th" as "t" as in "Tursday" or "Richard the Turd".

English singers will normally say "Parsley, Sage, Rosemary and Tyme" in spite of the "th" in the word, but I've noticed several Irish singers doing the song that pronounce the "th" and make it "thyme".

So is it the English or the Irish who are being perverse?