Some holidays require a specific way of dressing or dressing up. Here's the rankings.
  1. Fourth of July
    Red, white and blue. Three separately good colors and a great combination.
  2. St. Patrick's Day
    Green. Simple. And a good color.
  3. Halloween
    Not blackface. Not too difficult, just less defined in terms of colors to wear.
  4. Christmas
    Ugly sweaters. Red and green. Average combination.
  5. Valentine's Day
    Not sure if dress up is required. And if so, pink or red? Or both? Not gonna top the list with so many uncertainties.