80 years old now in 2024 - what year born?

Today, 10 October 2024 if a person is 80 years old now, what year was he born? See below:

If 80 years old, year of birth is:
1943 or 1944*

*It depends on whether he was born before or after 1 January 1944.

If now 80 years and his year of birth 1943 if he was born after 10 October 1943 until 31 december 1943 inclusively, and his year of birth is 1944 if he was born from 1 January 1944 to 10 October 1944.

Other examples:

If now 10 years, year of birth 2013 or 2014
If now 14 years, year of birth 2009 or 2010
If now 20 years, year of birth 2003 or 2004
If now 88 years, year of birth 1935 or 1936

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