You are 40 years old if you were born on May 21, 1983.
You are 40 years 10 months, 1 week, and 1 day old or 490 months old or 2,131 weeks old or 14,923 days old or 358,152 hours old or 21,489,120 minutes old or 1,289,347,200 seconds old You were born on a Saturday.