You are 40 years old if you were born on May 9, 1983.
You are 40 years 10 months, 2 weeks, and 5 days old or 490 months old or 2,133 weeks old or 14,934 days old or 358,416 hours old or 21,504,960 minutes old or 1,290,297,600 seconds old You were born on a Monday.