What is a white tie dress code for women? White-tie rules for women are less strict and similar to those for black tie, however the chief requirement is a full-length ball gown or dress.

Black-tie attire is the most formal dress code for evening events, requiring tuxedos for men and floor-length gowns for women. This isn’t the time for a regular suit.

Whether you're attending a wedding that calls for a semi-formal dress code or have been invited to a garden party, here are the best cocktail dresses for older women to shop now.

Black Tie If the dress code is black tie, you can expect the wedding to be an elevated event. Women should wear floor-length gowns (read: no midi dresses) or an elegant pantsuit.

As the most formal dress code, black-tie is traditionally reserved for ceremonies that take place after 5 p.m., which Lahey says ties back to the historical divide between daytime and evening wear.

When the dress code is cocktail attire, though, it's best to swap them out for something a little more formal. A go-to is a classic pair of heels or a dressy flat (for those who want extra comfort).