Wilson served as the Premier of Tasmania. He held this position until the day he died, February 29, 1880. Even though Wilson was 68 years old, he died on his 17th birthday.
Every 4 years in our calendar there is a Leap Year (2008 was a Leap Year, and 2012 will be the next one). On a Leap Year, there is an extra day, known as Leap Day, on February 29. Normally February is only 28 days long, so if you are born on a Leap Day your birthday technically comes once every four years.