I had never heard of Tartan Day until I found this board. This year it was raining a torrent so I did not go to the parade but I did go to hear the pipers at a pub in Alexandria Virgina afterwards. It was jammed with tartan clad celebrants, many of whom HAD gone to the parade.

I have to assume it was not advertised widely in the Washington DC area but the St. Andrew's Society and others had spread the news by word of mouth.