38 years old now in 2023 - what year born?

Today, 24 September 2023 if a person is 38 years old now, what year was he born? See below:

If 38 years old, year of birth is:
1984 or 1985*

*It depends on whether he was born before or after 1 January 1985.

If now 38 years and his year of birth 1984 if he was born after 24 September 1984 until 31 december 1984 inclusively, and his year of birth is 1985 if he was born from 1 January 1985 to 24 September 1985.

Other examples:

If now 5 years, year of birth 2017 or 2018
If now 14 years, year of birth 2008 or 2009
If now 30 years, year of birth 1992 or 1993
If now 76 years, year of birth 1946 or 1947

HTML code:

BB code: