92 years old now in 2023 - what year born?

Today, 10 June 2023 if a person is 92 years old now, what year was he born? See below:

If 92 years old, year of birth is:
1930 or 1931*

*It depends on whether he was born before or after 1 January 1931.

If now 92 years and his year of birth 1930 if he was born after 10 June 1930 until 31 december 1930 inclusively, and his year of birth is 1931 if he was born from 1 January 1931 to 10 June 1931.

Other examples:

If now 5 years, year of birth 2017 or 2018
If now 16 years, year of birth 2006 or 2007
If now 30 years, year of birth 1992 or 1993
If now 83 years, year of birth 1939 or 1940

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