You are 21 years old if you were born on September 12, 2002.
You are 21 years 7 months, 1 week, and 4 days old or 259 months old or 1,127 weeks old or 7,894 days old or 189,456 hours old or 11,367,360 minutes old or 682,041,600 seconds old You were born on a Thursday.