79 years old now in 2025 - what year born?

Today, 19 December 2025 if a person is 79 years old now, what year was he born? See below:

If 79 years old, year of birth is:
1945 or 1946*

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

If now 79 years and his year of birth 1945 if he was born after 19 December 1945 until 31 december 1945 inclusively, and his year of birth is 1946 if he was born from 1 January 1946 to 19 December 1946.

Other examples:

If now 11 years, year of birth 2013 or 2014
If now 14 years, year of birth 2010 or 2011
If now 30 years, year of birth 1994 or 1995
If now 77 years, year of birth 1947 or 1948

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