Tartan Day is here!
A brief history of Tartan Day, courtesy of Christine O'Keefe:
National Tartan Day is on April 6th in Canada and America and July 1st in Australia and New Zealand. It celebrates the heritage of the Highland Scots, people descended from a race of people called the Celts; an Indo-European civilization who migrated from Russia in 1050 BC to cover Europe. Tartan Day was established in 1991 in Canada in response to action initiated by the Clans & Scottish Societies of Canada, and in America on March 20th 1998, by US Senate Republican majority leader Trent Lott (Senate Resolution 155).
Here's a link to a copy of SR 155 which designated April 6 as National Tartan Day here in the US. April 6th was chosen because April 6th, 1320, was the date of the signing of the Declaration of Arbroath. Take a look at it. You should notice some resemblance to our own Declaration of Independence.