You are 123 years old if you were born on December 31, 1900.
You are 123 years 3 months, 3 weeks, and 4 days old or 1480 months old or 6,434 weeks old or 45,041 days old or 1,080,984 hours old or 64,859,040 minutes old or 3,891,542,400 seconds old You were born on a Monday.