11 years old now in 2026 - what year born?

Today, 28 October 2026 if a person is 11 years old now, what year was he born? See below:

If 11 years old, year of birth is:
2014 or 2015*

*It depends on whether he was born before or after 1 January 2015.

If now 11 years and his year of birth 2014 if he was born after 28 October 2014 until 31 december 2014 inclusively, and his year of birth is 2015 if he was born from 1 January 2015 to 28 October 2015.

Other examples:

If now 7 years, year of birth 2018 or 2019
If now 14 years, year of birth 2011 or 2012
If now 18 years, year of birth 2007 or 2008
If now 33 years, year of birth 1992 or 1993

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