54 years old now in 2025 - what year born?

Today, 16 June 2025 if a person is 54 years old now, what year was he born? See below:

If 54 years old, year of birth is:
1970 or 1971*

*It depends on whether he was born before or after 1 January 1971.

If now 54 years and his year of birth 1970 if he was born after 16 June 1970 until 31 december 1970 inclusively, and his year of birth is 1971 if he was born from 1 January 1971 to 16 June 1971.

Other examples:

If now 3 years, year of birth 2021 or 2022
If now 14 years, year of birth 2010 or 2011
If now 27 years, year of birth 1997 or 1998
If now 34 years, year of birth 1990 or 1991

HTML code:

BB code: