You are 21 years old if you were born on December 20, 2002.
You are 21 years 3 months, 1 week, and 2 days old or 255 months old or 1,110 weeks old or 7,770 days old or 186,480 hours old or 11,188,800 minutes old or 671,328,000 seconds old You were born on a Friday.