(one's) 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.
See also: fin, Sunday
Farlex Dictionary of Idioms.
See also:
  • (one's) Sunday best
  • get into (one's) Sunday best
  • Sunday best
  • your Sunday best
  • clothes
  • Sunday-go-to-meeting clothes
  • (one's) Sunday-go-to-meeting clothes
  • in (one's) Sunday best
  • in Sunday best
  • be in (one's) Sunday best