118 years old now in 2025 - what year born?

Today, 18 January 2025 if a person is 118 years old now, what year was he born? See below:

If 118 years old, year of birth is:
1906 or 1907*

*It depends on whether he was born before or after 1 January 1907.

If now 118 years and his year of birth 1906 if he was born after 18 January 1906 until 31 december 1906 inclusively, and his year of birth is 1907 if he was born from 1 January 1907 to 18 January 1907.

Other examples:

If now 3 years, year of birth 2021 or 2022
If now 14 years, year of birth 2010 or 2011
If now 23 years, year of birth 2001 or 2002
If now 86 years, year of birth 1938 or 1939

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