You are 21 years old if you were born on January 4, 2003.
You are 21 years 2 months, 3 weeks, and 3 days old or 254 months old or 1,107 weeks old or 7,754 days old or 186,096 hours old or 11,165,760 minutes old or 669,945,600 seconds old You were born on a Saturday.