If you're a British woman and invited to the royal wedding, you may be expected to wear a hat. Why?<br />The BBC says that it is all about royal protocol. <br />The British social protocol stretches back to before the 1950's when women didn't really show off their hair in public. <br />The protocol dictates that "women must wear hats to all official occasions." <br />The royal family is known for keeping traditions that may have faded from the mainstream, like curtsying, to make them stand out. <br />
