(one's) Sunday finest(redirected from his sunday finest)
(one's) Sunday finest
One's very best clothes, as one would wear to a Sunday church service. Instead of some big party, let's all get dressed up in our Sunday finest and go for lunch at a fancy restaurant for my birthday! This is going to be a formal event, so please come dressed in your Sunday finest.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.