50 years old now in 2026 - what year born?

Today, 28 October 2026 if a person is 50 years old now, what year was he born? See below:

If 50 years old, year of birth is:
1975 or 1976*

*It depends on whether he was born before or after 1 January 1976.

If now 50 years and his year of birth 1975 if he was born after 28 October 1975 until 31 december 1975 inclusively, and his year of birth is 1976 if he was born from 1 January 1976 to 28 October 1976.

Other examples:

If now 6 years, year of birth 2019 or 2020
If now 17 years, year of birth 2008 or 2009
If now 23 years, year of birth 2002 or 2003
If now 56 years, year of birth 1969 or 1970

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