What to wear depends what is customary and according to the dress code indicated on the invitation. It is important, however, that what you wear is modest. If the occasion involves a church ceremony, lady guests should wear clothes that cover the legs and arms and not wear clothes with a low-cut neckline, or use a shawl or wrap to cover the arms and cleavage, if the dress to be worn at the reception is short sleeved and with a low neckline.
