Caesar’s calendar added this intercalary day after Feb. 23 by extending Feb. 24 to 48 hours. Because this double day fell on the sixth day before the start of March, it came to be known as the ...
Happy birthday, leaplings! The next Leap Day is Feb. 29, 2028. If you were born on Leap Day 1928, you’ll be 100 years old or 25 in Leap Day years.