41 years old now in 2023 - what year born?

Today, 1 February 2023 if a person is 41 years old now, what year was he born? See below:

If 41 years old, year of birth is:
1981 or 1982*

*It depends on whether he was born before or after 1 January 1982.

If now 41 years and his year of birth 1981 if he was born after 1 February 1981 until 31 december 1981 inclusively, and his year of birth is 1982 if he was born from 1 January 1982 to 1 February 1982.

Other examples:

If now 8 years, year of birth 2014 or 2015
If now 16 years, year of birth 2006 or 2007
If now 22 years, year of birth 2000 or 2001
If now 43 years, year of birth 1979 or 1980

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