The year 2012 is a LEAP YEAR which means we have one additional day in the month of February and as a result, one additional day in our year.
It takes 365 days plus a little more for the earth to travel around the sun. This “little bit more” is evened out every four years with an extra day–February 29.
Babies born on this special day, celebrate on their actual birthdate once every four years. On their non-leap year birthdays, they must celebrate on a day close to February 29–February 28 or March 1.