You are 45 years old if you were born on December 18, 1978.
You are 45 years 3 months, 1 week, and 3 days old or 543 months old or 2,362 weeks old or 16,537 days old or 396,888 hours old or 23,813,280 minutes old or 1,428,796,800 seconds old You were born on a Monday.