38 years old now in 2025 - what year born?

Today, 19 April 2025 if a person is 38 years old now, what year was he born? See below:

If 38 years old, year of birth is:
1986 or 1987*

*It depends on whether he was born before or after 1 January 1987.

If now 38 years and his year of birth 1986 if he was born after 19 April 1986 until 31 december 1986 inclusively, and his year of birth is 1987 if he was born from 1 January 1987 to 19 April 1987.

Other examples:

If now 3 years, year of birth 2021 or 2022
If now 17 years, year of birth 2007 or 2008
If now 24 years, year of birth 2000 or 2001
If now 64 years, year of birth 1960 or 1961

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