71 years old now in 2024 - what year born?

Today, 15 October 2024 if a person is 71 years old now, what year was he born? See below:

If 71 years old, year of birth is:
1952 or 1953*

*It depends on whether he was born before or after 1 January 1953.

If now 71 years and his year of birth 1952 if he was born after 15 October 1952 until 31 december 1952 inclusively, and his year of birth is 1953 if he was born from 1 January 1953 to 15 October 1953.

Other examples:

If now 9 years, year of birth 2014 or 2015
If now 12 years, year of birth 2011 or 2012
If now 28 years, year of birth 1995 or 1996
If now 33 years, year of birth 1990 or 1991

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