101 years old now in 2023 - what year born?

Today, 29 May 2023 if a person is 101 years old now, what year was he born? See below:

If 101 years old, year of birth is:
1921 or 1922*

*It depends on whether he was born before or after 1 January 1922.

If now 101 years and his year of birth 1921 if he was born after 29 May 1921 until 31 december 1921 inclusively, and his year of birth is 1922 if he was born from 1 January 1922 to 29 May 1922.

Other examples:

If now 7 years, year of birth 2015 or 2016
If now 13 years, year of birth 2009 or 2010
If now 19 years, year of birth 2003 or 2004
If now 95 years, year of birth 1927 or 1928

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