Wedding rules are different for different time wedding of the day, and the wedding “rules” may get you confused. You just want to know what to wear to the wedding, don’t worry, here is more advice for what to wear to a wedding.
Wedding Guest Style for Her
Informal Daytime: Short dress or suit (business attire OK for morning weddings)
Informal Evening: Cocktail dress (which is any dressier dress -- for example, a little black dress -- that's not full-length.)
Semi-Formal Daytime: Short dress or suit
Semi-formal Evening: Cocktail dress
Formal Daytime: Short dress or suit. Hats and gloves are optional.
Formal Evening or Black-Tie: Long or dressy short cocktail (beading, glam accessories, wrap)
Ultra-formal or White Tie: Long gown, extra glitz (furs, diamonds, etc.)
Dos and Don'ts for Her
Don't wear white because it competes with the bride. There are plenty of other colors available. This rule may seem outdated, but it's actually just good etiquette to not compete with the bride on her special day.
Don't wear black or sequins during the daytime. Anything too sparkly will make you look overdressed.
Don't worry about wearing the same colors as the bridesmaids or mothers. You can't possibly coordinate with everyone in the wedding party.
Do wear something feminine and appropriate, out of respect for your hosts. Clubwear, overtly sexy clothing (strapless, see-through, etc) doesn't belong at a wedding. If you have to ask if it's appropriate, it probably isn't.
Don't wear opera-length gloves (to top of arm) with anything but sleeveless or strapless gowns.
Do take off gloves to eat or drink.
Do use good judgment if the invitation doesn't specify the formality of the event. A pastel suit or soft floral dress for daytime or a little blackdress for evening (after 6 p.m.) will take you almost anywhere.