116 years old now in 2025 - what year born?

Today, 7 November 2025 if a person is 116 years old now, what year was he born? See below:

If 116 years old, year of birth is:
1908 or 1909*

*It depends on whether he was born before or after 1 January 1909.

If now 116 years and his year of birth 1908 if he was born after 7 November 1908 until 31 december 1908 inclusively, and his year of birth is 1909 if he was born from 1 January 1909 to 7 November 1909.

Other examples:

If now 9 years, year of birth 2015 or 2016
If now 17 years, year of birth 2007 or 2008
If now 19 years, year of birth 2005 or 2006
If now 87 years, year of birth 1937 or 1938

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