128 years old now in 2023 - what year born?

Today, 31 January 2023 if a person is 128 years old now, what year was he born? See below:

If 128 years old, year of birth is:
1894 or 1895*

*It depends on whether he was born before or after 1 January 1895.

If now 128 years and his year of birth 1894 if he was born after 31 January 1894 until 31 december 1894 inclusively, and his year of birth is 1895 if he was born from 1 January 1895 to 31 January 1895.

Other examples:

If now 9 years, year of birth 2013 or 2014
If now 14 years, year of birth 2008 or 2009
If now 18 years, year of birth 2004 or 2005
If now 84 years, year of birth 1938 or 1939

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