get into (one's) Sunday best

get into (one's) Sunday best

To get dressed in one's very best clothes, as one would wear to a Sunday church service. Instead of some big party, let's all get into our Sunday best and go for lunch at a fancy restaurant for my birthday! This is going to be a formal event, so we all need to get into our Sunday best.
See also: get, Sunday
Farlex Dictionary of Idioms.
See also:
  • (one's) Sunday best
  • Sunday best
  • your Sunday best
  • in (one's) Sunday best
  • in Sunday best
  • be in (one's) Sunday best
  • best do
  • (had) best (do something)
  • as best (one) can
  • as best you can