126 years old now in 2026 - what year born?

Today, 28 October 2026 if a person is 126 years old now, what year was he born? See below:

If 126 years old, year of birth is:
1899 or 1900*

*It depends on whether he was born before or after 1 January 1900.

If now 126 years and his year of birth 1899 if he was born after 28 October 1899 until 31 december 1899 inclusively, and his year of birth is 1900 if he was born from 1 January 1900 to 28 October 1900.

Other examples:

If now 12 years, year of birth 2013 or 2014
If now 13 years, year of birth 2012 or 2013
If now 21 years, year of birth 2004 or 2005
If now 53 years, year of birth 1972 or 1973

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