82 years old now in 2023 - what year born?

Today, 22 March 2023 if a person is 82 years old now, what year was he born? See below:

If 82 years old, year of birth is:
1940 or 1941*

*It depends on whether he was born before or after 1 January 1941.

If now 82 years and his year of birth 1940 if he was born after 22 March 1940 until 31 december 1940 inclusively, and his year of birth is 1941 if he was born from 1 January 1941 to 22 March 1941.

Other examples:

If now 8 years, year of birth 2014 or 2015
If now 17 years, year of birth 2005 or 2006
If now 21 years, year of birth 2001 or 2002
If now 51 years, year of birth 1971 or 1972

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