the.com/leapyear
the calendar's quiet apology for the planet that refuses to count in whole numbers
orbit mathEarth's year is actually 365.2422 days long
century rule1900 had no leap day, but 2000 did
rare birthFeb 29 babies are called leaplings, born once per 1,461 days
caesar's fixJulius Caesar invented leap years in 46 BC
overshootWithout correction, July would drift into winter eventually