43 years old now in 2024 - what year born?

Today, 15 September 2024 if a person is 43 years old now, what year was he born? See below:

If 43 years old, year of birth is:
1980 or 1981*

*It depends on whether he was born before or after 1 January 1981.

If now 43 years and his year of birth 1980 if he was born after 15 September 1980 until 31 december 1980 inclusively, and his year of birth is 1981 if he was born from 1 January 1981 to 15 September 1981.

Other examples:

If now 9 years, year of birth 2014 or 2015
If now 17 years, year of birth 2006 or 2007
If now 27 years, year of birth 1996 or 1997
If now 64 years, year of birth 1959 or 1960

HTML code:

BB code: