58 years old now in 2024 - what year born?

Today, 10 October 2024 if a person is 58 years old now, what year was he born? See below:

If 58 years old, year of birth is:
1965 or 1966*

*It depends on whether he was born before or after 1 January 1966.

If now 58 years and his year of birth 1965 if he was born after 10 October 1965 until 31 december 1965 inclusively, and his year of birth is 1966 if he was born from 1 January 1966 to 10 October 1966.

Other examples:

If now 11 years, year of birth 2012 or 2013
If now 12 years, year of birth 2011 or 2012
If now 27 years, year of birth 1996 or 1997
If now 92 years, year of birth 1931 or 1932

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