41 years old now in 2023 - what year born?

Today, 7 December 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 7 December 1981 until 31 december 1981 inclusively, and his year of birth is 1982 if he was born from 1 January 1982 to 7 December 1982.

Other examples:

If now 3 years, year of birth 2019 or 2020
If now 12 years, year of birth 2010 or 2011
If now 20 years, year of birth 2002 or 2003
If now 81 years, year of birth 1941 or 1942

HTML code:

BB code: