You are 40 years old if you were born on February 9, 1984.
You are 40 years 2 months, 1 week, and 2 days old or 482 months old or 2,097 weeks old or 14,679 days old or 352,296 hours old or 21,137,760 minutes old or 1,268,265,600 seconds old You were born on a Thursday.