Summer festive — look sharp, stay cool. Think suits or linen blazers in light colors, sundresses, jumpsuits, or anything you'd wear to a stylish Mediterranean dinner party. No ties needed (it's August in Spain, we wouldn't do that to you). The ceremony and reception are outdoors, so breathable fabrics are your friend, and ladies may want to skip stilettos in favor of block heels or flats for the garden terrain. Most importantly: wear something you can dance in.