You are 19 years old if you were born on December 9, 2004.
You are 19 years 4 months, 2 weeks, and 2 days old or 232 months old or 1,011 weeks old or 7,077 days old or 169,848 hours old or 10,190,880 minutes old or 611,452,800 seconds old You were born on a Thursday.