An appropriate outfit for an engagement party varies based on the party's location, time and overall formality level. Generally, parties held at night or in the evening warrant more formal attire than those held during the day. An upscale locale, such as a country club or hotel, requires fancier clothing than an event held at someone's home.
At a formal engagement party, men can wear suits and women may opt for a cocktail dress with heels. For less formal parties that still demand dressy attire, the male guests are able to sport a blazer and khakis, while the female guests may wear dress pants or a skirt with their favorite blouse.
For casual parties, men may wear jeans or khakis with a button-down or polo shirt. Women can choose from a sundress or a fun top paired with jeans or capris.