Matthew Schneier of style.com offers suggestions for dragging Dad's wedding wardrobe into this decade.

The Look: Tuxedo

Nix the cummerbund and vest and keep it simple with a black satin bow tie. And if the knot you tie isn't perfect, that's fine—it'll have a natural, personal look. (YouTube has millions of how-to videos.) Finish it off with a crisp white pocket square.

Tuxedo, $1,495, and shirt, $175, both Hickey Freeman; bow tie, $110, Alexander Olch.