128 years old now in 2023 - what year born?

Today, 7 December 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 7 December 1894 until 31 december 1894 inclusively, and his year of birth is 1895 if he was born from 1 January 1895 to 7 December 1895.

Other examples:

If now 11 years, year of birth 2011 or 2012
If now 18 years, year of birth 2004 or 2005
If now 21 years, year of birth 2001 or 2002
If now 90 years, year of birth 1932 or 1933

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