You are 40 years old if you were born on December 12, 1983.
You are 40 years 4 months, 3 weeks, and 5 days old or 485 months old or 2,108 weeks old or 14,758 days old or 354,192 hours old or 21,251,520 minutes old or 1,275,091,200 seconds old You were born on a Monday.