[wideawake]

Sorry.....a great kilt and a tam would be ridiculous and certainly not formal wear.

Tell that to Scotsmen attending formal events in the UK.

[Churchillspirit]

No self-respecting Scot would appear at a formal dressed like that.

I have attended hundreds - yes hundreds - of Scottish formals in the UK and anyone dressed in a great kilt and a tam would be considered very odd indeed.