4. Semi Formal or Dressy Casual
These events call for a little assumption on your part, depending on the time of day. For evenings, choose darker, more formal colors. For daytime events, go for lighter colors and fabrics.
For men, semi-formal means a suit and tie of varying shade, depending on the season and time of the event. For women, a cocktail dress or a dressy skirt and blouse would be fine.