108 years old now in 2026 - what year born?

Today, 28 October 2026 if a person is 108 years old now, what year was he born? See below:

If 108 years old, year of birth is:
1917 or 1918*

*It depends on whether he was born before or after 1 January 1918.

If now 108 years and his year of birth 1917 if he was born after 28 October 1917 until 31 december 1917 inclusively, and his year of birth is 1918 if he was born from 1 January 1918 to 28 October 1918.

Other examples:

If now 4 years, year of birth 2021 or 2022
If now 13 years, year of birth 2012 or 2013
If now 19 years, year of birth 2006 or 2007
If now 65 years, year of birth 1960 or 1961

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