Wedding season is officially upon us – which means it’s time to struggle with overwhelming gift registries and confusing dress codes (what the hell is “cocktail semi-casual??”). To help us sort through all of the madness, we’re chatting with Lizzie Post, author of “Emily Post’s Etiquette - the Centennial Edition” and co-host of the podcast “Awesome Etiquette” (also Emily Post’s great-great-grandaughter!). Learn about the importance of RSVP cards, whether or not it’s okay to buy a gift off-registry, and why wearing all white to a wedding as a guest is the ultimate faux pas.