If born on 1700-10-31, will be 20 years old on 1721-09-30
If born on 1801-11-01, will be 50 years old on 1852-05-02
If born on 1902-12-02, will be 97 years old on 2000-01-01
If born on 2003-01-20, will be 6 years old on 2009-06-30
