Can I wear a long dress to a cocktail wedding?

You can, but you may be overdressed. Floor-length is traditional for black tie. For cocktail, knee to midi length is most appropriate.

Is cocktail the same as semi-formal?

They're similar and often used interchangeably. Both fall between casual and black tie. Cocktail might be slightly dressier than semi-formal.

Traditionally yes, though modern weddings sometimes allow tieless looks with nice suits. When unsure, wear the tie.

Wear a well-fitted suit in dark colors - navy, charcoal, or black. Light gray works for daytime summer weddings.

Pair with a dress shirt and tie. The tie is expected for cocktail attire, though some modern weddings are more relaxed. Match belt and shoes.

Dress shoes are required - oxfords or loafers in black or brown. No sneakers or casual shoes regardless of how "dressy" they seem.

Knee-length or midi cocktail dresses are classic choices. The "cocktail dress" got its name from this dress code.

Dressy separates work too - an elegant top with dress pants or a chic skirt. Jumpsuits have become popular cocktail attire options.

Heel height varies by comfort and preference. Dressy flats are acceptable. Avoid casual sandals or sneakers.

Summer: Lighter colors acceptable. Lighter fabrics like cotton or linen for comfort. Short sleeves fine.

Fall/Winter: Richer colors like burgundy, emerald, navy. Velvet and heavier fabrics. Layering with elegant wraps or blazers.

Consider outdoor portions of the wedding. Bring wraps for evening temperature drops. Choose heel styles appropriate for any outdoor walking.

Nothing too casual: no jeans, shorts, casual dresses, or t-shirts. Even nice versions don't meet cocktail standards.

Nothing too formal: skip floor-length gowns and tuxedos (save those for black tie).

Nothing too revealing or attention-grabbing. The couple is the focus. Elegant, not eye-catching.