You are 39 years old if you were born on September 21, 1984.
You are 39 years 6 months, 3 weeks, and 6 days old or 475 months old or 2,064 weeks old or 14,453 days old or 346,872 hours old or 20,812,320 minutes old or 1,248,739,200 seconds old You were born on a Friday.