You never know when it's coming. You move along with your normal life until one day—BOOM—Facebook is flooded with sepia-toned images of siblings. April 10 is National Sibling Day, the sort-of national holiday that's mostly about flipping on the Way Back Machine on social media.
This year, you can get a little something out of the day in the real world as well. From April 10-16, hit your local 7-Eleven with a sibling and get buy one, get one free Slurpees in any size to make sure you get along with your sibling for at least one day. Also, your "sibling" can be basically anyone who you're friendly with. There's no ID requirement. If you've told someone you "love them like a brother," well, you can get a free Slurpee together.