You are 45 years old if you were born on September 21, 1978.
You are 45 years 6 months, 4 weeks, and 1 day old or 547 months old or 2,378 weeks old or 16,647 days old or 399,528 hours old or 23,971,680 minutes old or 1,438,300,800 seconds old You were born on a Thursday.