6th April 98 was declared National Tartan Day in the US for the first
time. This date was chosen because 6th April 1320 was the date of the
signing of the Declaration of Arbroath (see [11.3]), which formed the
basis for the US Declaration of Independence. See
http://www.tartanday.com/
MacLennan (Gaelic dictionary - published 1925) writes (under breacan)
A parti-coloured dress, used by the Celts from the earliest times.
"Breacan an fhe/ilidh", the belted plaid (consisting of twelve yards
of tartan, worn round the waist, obliquely across the breast and
over the left shoulder, and partly depending backwards). According
to Keating it was the custom in ancient time to have one colour in
the form of a slave, two in the dress of a peasant, three in the
dress of a soldier or young lord, four in the dress of a brughaidh
(land-holder), five in the dress of a district chief, six in the
dress of an ollamh, and in that of a King and Queen.
This info about number of tartan colours and rank should perhaps
be taken with a pinch of salt.
The use of tartan in Scotland predates the kilt as tartan appeared
as a design before the small kilt was invented. The first recorded
use of the modern kilt was in 1575, but the use of tartan predates
this significantly.
John Andrea's WWW page of tartans
http://www.stfx.ca/people/jandrea/projects/tartans.html
Also see: ftp://members.aol.com/sdullman/programs/tartan20.zip
- displays about 60 tartans
the Tartan Finder
http://www.house-of-tartan.scotland.net/house/default.htp
http://www.tinsel.org/tinsel/Java/Tartan/
A combination of a Java program and an online database that can be
used to browse a collection of tartans with a web browser. There's
currently about 270 setts online, adapted from the popular X-Windows
program xtartan.
http://www.strathearn.com/tartan/
http://www.tartans.com/