You are 19 years old if you were born on December 20, 2004.
You are 19 years 3 months, 4 weeks, and 2 days old or 232 months old or 1,008 weeks old or 7,060 days old or 169,440 hours old or 10,166,400 minutes old or 609,984,000 seconds old You were born on a Monday.