Quote Originally Posted by Rex_Tremende View Post
If it's a formal event, a black tie will be appropriate with the Argyll jacket and vest. May I suggest a lay-down collar tux shirt with the black tie? (Stand-up collars call for white ties, but I know this is not the modern convention.)

Have fun,
Rex.
Well said.

Also, since it is a Ceilidh and not an RSCDS ball Semi formal will do just as well as formal would.