121 years old now in 2026 - what year born?

Today, 28 October 2026 if a person is 121 years old now, what year was he born? See below:

If 121 years old, year of birth is:
1904 or 1905*

*It depends on whether he was born before or after 1 January 1905.

If now 121 years and his year of birth 1904 if he was born after 28 October 1904 until 31 december 1904 inclusively, and his year of birth is 1905 if he was born from 1 January 1905 to 28 October 1905.

Other examples:

If now 11 years, year of birth 2014 or 2015
If now 12 years, year of birth 2013 or 2014
If now 18 years, year of birth 2007 or 2008
If now 84 years, year of birth 1941 or 1942

HTML code:

BB code: