58 years old now in 2025 - what year born?

Today, 16 June 2025 if a person is 58 years old now, what year was he born? See below:

If 58 years old, year of birth is:
1966 or 1967*

*It depends on whether he was born before or after 1 January 1967.

If now 58 years and his year of birth 1966 if he was born after 16 June 1966 until 31 december 1966 inclusively, and his year of birth is 1967 if he was born from 1 January 1967 to 16 June 1967.

Other examples:

If now 8 years, year of birth 2016 or 2017
If now 18 years, year of birth 2006 or 2007
If now 25 years, year of birth 1999 or 2000
If now 35 years, year of birth 1989 or 1990

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