102 years old now in 2025 - what year born?

Today, 16 January 2025 if a person is 102 years old now, what year was he born? See below:

If 102 years old, year of birth is:
1922 or 1923*

*It depends on whether he was born before or after 1 January 1923.

If now 102 years and his year of birth 1922 if he was born after 16 January 1922 until 31 december 1922 inclusively, and his year of birth is 1923 if he was born from 1 January 1923 to 16 January 1923.

Other examples:

If now 9 years, year of birth 2015 or 2016
If now 16 years, year of birth 2008 or 2009
If now 27 years, year of birth 1997 or 1998
If now 53 years, year of birth 1971 or 1972

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