You are 123 years old if you were born on July 21, 1900.
You are 123 years 9 months and 5 days old or 1485 months old or 6,457 weeks old or 45,205 days old or 1,084,920 hours old or 65,095,200 minutes old or 3,905,712,000 seconds old You were born on a Saturday.