Joining National Peanut Butter Day (and National Wine Day), today marks one of our most beloved quirky holidays. It's National Grammar Day. And in true, celebratory spirit, we're giving y'all a gift. (Who said Christmas and birthdays had to have all the fun?) Spread the love by sharing our "Grammar Etiquette 101" infographic below to coworkers, family and perhaps those special Facebook friends who don't proofread before sharing whatever it is that's on their minds.