You are 25 years old if you were born on December 21, 1998.
You are 25 years 3 months, 4 weeks, and 1 day old or 304 months old or 1,321 weeks old or 9,251 days old or 222,024 hours old or 13,321,440 minutes old or 799,286,400 seconds old You were born on a Monday.