35 years old now in 2023 - what year born?

Today, 26 March 2023 if a person is 35 years old now, what year was he born? See below:

If 35 years old, year of birth is:
1987 or 1988*

*It depends on whether he was born before or after 1 January 1988.

If now 35 years and his year of birth 1987 if he was born after 26 March 1987 until 31 december 1987 inclusively, and his year of birth is 1988 if he was born from 1 January 1988 to 26 March 1988.

Other examples:

If now 4 years, year of birth 2018 or 2019
If now 17 years, year of birth 2005 or 2006
If now 22 years, year of birth 2000 or 2001
If now 37 years, year of birth 1985 or 1986

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