41 years old now in 2026 - what year born?

Today, 28 October 2026 if a person is 41 years old now, what year was he born? See below:

If 41 years old, year of birth is:
1984 or 1985*

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

If now 41 years and his year of birth 1984 if he was born after 28 October 1984 until 31 december 1984 inclusively, and his year of birth is 1985 if he was born from 1 January 1985 to 28 October 1985.

Other examples:

If now 6 years, year of birth 2019 or 2020
If now 15 years, year of birth 2010 or 2011
If now 19 years, year of birth 2006 or 2007
If now 80 years, year of birth 1945 or 1946

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