About National Tartan Day
National Tartan Day is an American celebration that recognizes the contributions of Scots and Scottish-Americans to the development of the United States. In 1998 the U.S. Senate passed a resolution recognizing April 6 as National Tartan Day in recognition of "the outstanding contribution of millions of Scots-Americans to our great nation."
The date commemorates the signing of the Declaration of Arbroath in 1320, which was an influence on the American Declaration of Independence. Almost half of the signatories on the Declaration of Independence were of Scottish descent, while three-quarters of U.S. presidents have been of Scottish ancestry.