For an anniversary celebration, you can wear a variety of outfits depending on the formality and theme of the event. A popular choice is a cocktail dress or a chic evening gown for more formal affairs. For a casual or semi-formal setting, a stylish dress or a skirt paired with a blouse or a tailored jumpsuit can be a great option. Consider the venue, weather, and personal style when choosing your outfit. Ultimately, the goal is to dress up and feel confident while honoring the special occasion.