Marketing Infographic: 4 million people were born on Leap Day And they’re called Leaplings! All the facts you need about Leap Day—from why it happens to historic moments on Feb. 29—in this handy infographic. By Michael SebastianFeb. 29, 2012 SHARE Ragan Insider Premium Content The prevailing theme of Leap Day—which is, of course, today—is that once every four years you’re given an extra day to do … something. Just look at Twitter, where tweet after tweet offers some version of, “Make today count!” But no pressure. To read the full story, log in. Become a Ragan Insider member to read this article and all other archived content. Sign up today Already a member? Log in here. Learn more about Ragan Insider.