If you’re like most people, you probably don’t know what your birthday is. But if you follow Instagram, there’s a good chance that someone has already posted a photo of themselves on the platform with the date in parentheses next to it. So how do you find out? The easiest way is to use the search bar at the top of Instagram and type in “birthday.” You’ll then get a list of all of the posts with that date in parentheses. If someone has posted a photo on Instagram with that date in parentheses, they’re probably also celebrating that day on their account.