Again demonstrating the how culturally different things can be across the widespread regions of the USA, I had never heard of National Tartan Day before joining this forum. And this is in West Michigan - we have a lot of Scottish ancestry here, and we're quite close to Canada where it sounds like Tartan Day is probably more of a thing. I have not seen it on any calendars, nobody really makes mention of it - and this is in a place where people gleefully celebrate Talk Like a Pirate Day.