80 years old now in 2026 - what year born?

Today, 28 October 2026 if a person is 80 years old now, what year was he born? See below:

If 80 years old, year of birth is:
1945 or 1946*

*It depends on whether he was born before or after 1 January 1946.

If now 80 years and his year of birth 1945 if he was born after 28 October 1945 until 31 december 1945 inclusively, and his year of birth is 1946 if he was born from 1 January 1946 to 28 October 1946.

Other examples:

If now 10 years, year of birth 2015 or 2016
If now 14 years, year of birth 2011 or 2012
If now 30 years, year of birth 1995 or 1996
If now 36 years, year of birth 1989 or 1990

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