79 years old now in 2023 - what year born?

Today, 24 September 2023 if a person is 79 years old now, what year was he born? See below:

If 79 years old, year of birth is:
1943 or 1944*

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

If now 79 years and his year of birth 1943 if he was born after 24 September 1943 until 31 december 1943 inclusively, and his year of birth is 1944 if he was born from 1 January 1944 to 24 September 1944.

Other examples:

If now 3 years, year of birth 2019 or 2020
If now 13 years, year of birth 2009 or 2010
If now 22 years, year of birth 2000 or 2001
If now 34 years, year of birth 1988 or 1989

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