35 years old now in 2026 - what year born?

Today, 28 October 2026 if a person is 35 years old now, what year was he born? See below:

If 35 years old, year of birth is:
1990 or 1991*

*It depends on whether he was born before or after 1 January 1991.

If now 35 years and his year of birth 1990 if he was born after 28 October 1990 until 31 december 1990 inclusively, and his year of birth is 1991 if he was born from 1 January 1991 to 28 October 1991.

Other examples:

If now 6 years, year of birth 2019 or 2020
If now 17 years, year of birth 2008 or 2009
If now 26 years, year of birth 1999 or 2000
If now 61 years, year of birth 1964 or 1965

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