80 years old now in 2025 - what year born?

Today, 7 November 2025 if a person is 80 years old now, what year was he born? See below:

If 80 years old, year of birth is:
1944 or 1945*

*It depends on whether he was born before or after 1 January 1945.

If now 80 years and his year of birth 1944 if he was born after 7 November 1944 until 31 december 1944 inclusively, and his year of birth is 1945 if he was born from 1 January 1945 to 7 November 1945.

Other examples:

If now 4 years, year of birth 2020 or 2021
If now 13 years, year of birth 2011 or 2012
If now 27 years, year of birth 1997 or 1998
If now 82 years, year of birth 1942 or 1943

HTML code:

BB code: