63 years old now in 2025 - what year born?

Today, 6 November 2025 if a person is 63 years old now, what year was he born? See below:

If 63 years old, year of birth is:
1961 or 1962*

*It depends on whether he was born before or after 1 January 1962.

If now 63 years and his year of birth 1961 if he was born after 6 November 1961 until 31 december 1961 inclusively, and his year of birth is 1962 if he was born from 1 January 1962 to 6 November 1962.

Other examples:

If now 10 years, year of birth 2014 or 2015
If now 17 years, year of birth 2007 or 2008
If now 25 years, year of birth 1999 or 2000
If now 66 years, year of birth 1958 or 1959

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