Plaid is fabric woven into a pattern called a tartan, and tartans pertain to specific family groups called clans. In Scotland, people wear tartans to show kinship with, or to honor a clan.
The identification of specific tartans to Highland clans only occurred at the beginning of the 19th century following a romantic revival. Prior to this tartan was produced in a region and worn by anyone in the locality whatever their clan and some of them were just numbered. They are generally only worn on formal occasions.
See related question
Most Scottish women in the 1800's wore a dress that had a plaid over it. A plaid is a cloak or hood and it is not the pattern.
Most people in Scotland DON'T wear plaid. It's just traditional.
The Scottish national sport teams wear dark blue with white.
I wouldn't... too much plaid
You can wear plaid in all seasons. But maybe it would be best....in winter and fall wear a plaid scarf or jacket/hoodie. In spring and summer wear plaid shorts or shirts. Plaid shoes socks, or anything else will work at all times.
Yes, of course you can wear plaid.
Plaid patterns have a long history, with their origins tracing back to ancient Celtic culture in the British Isles, where they were used in traditional tartans. The modern use of plaid began to gain popularity in the 18th century, particularly in Scotland. By the 19th century, plaid became fashionable in various clothing types, especially with the rise of the Scottish Highland dress and its adoption in mainstream fashion. Today, plaid is commonly seen in casual and formal wear across the globe.
Kilt
NO!!!
A plaid
The duration of Dead Men Don't Wear Plaid is 1.47 hours.
Kilts