You are 40 years old if you were born on December 5, 1983.
You are 40 years 3 months, 3 weeks, and 2 days old or 483 months old or 2,103 weeks old or 14,724 days old or 353,376 hours old or 21,202,560 minutes old or 1,272,153,600 seconds old You were born on a Monday.