February 29 is a date that usually occurs every four years, and is called the leap day. This day is added to the calendar in leap years as a corrective measure, because the Earth does not orbit the sun in precisely 365 days. The Gregorian calendar is a modification of the Julian calendar first used by the Romans.
A person born on February 29 may be called a "leapling", a "leaper", or a "leap-year baby". Some leaplings celebrate their birthday in non-leap years on either February 28 or March 1, while others only observe birthdays on the authentic intercalary date, February 29.
February 29 is of course also of significance to us cachers, not all of us, but those who keep a keen eye on the stats.
This cache as with my Forever Young cache will talk to your inner child, its not difficult but it should provide you with a smile.
Be safe and enjoy.