You are 39 years old if you were born on December 20, 1984.
You are 39 years 3 months, 1 week, and 2 days old or 471 months old or 2,049 weeks old or 14,344 days old or 344,256 hours old or 20,655,360 minutes old or 1,239,321,600 seconds old You were born on a Thursday.