122 years old now in 2026 - what year born?

Today, 28 October 2026 if a person is 122 years old now, what year was he born? See below:

If 122 years old, year of birth is:
1903 or 1904*

*It depends on whether he was born before or after 1 January 1904.

If now 122 years and his year of birth 1903 if he was born after 28 October 1903 until 31 december 1903 inclusively, and his year of birth is 1904 if he was born from 1 January 1904 to 28 October 1904.

Other examples:

If now 10 years, year of birth 2015 or 2016
If now 15 years, year of birth 2010 or 2011
If now 18 years, year of birth 2007 or 2008
If now 37 years, year of birth 1988 or 1989

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