Ancient and weathered tartans

[pascs]

I don't know if there is a english language breakdown here, but formal is black/white tie. Or if during the day, formal would be morning suit equivalent.

For the OP, I would wear a weathered tartan to a formal event, in fact, I have, it was a MacLaren tartan kilt. The only difference to the Ferguson tartan is that our yellow stripe is your white stripe

Sorry typo on my part should have written informal

I think it depends on the weathered tartan, my Mackenzie weathered is light browns and greys which I dont feel goes well with black jacket etc. However if the tartan is more blues and greens then that would fit better.

I do have our local Burns night tonight so might try out the weathered tartan and see how it looks