14 years old now in 2023 - what year born?

Today, 26 September 2023 if a person is 14 years old now, what year was he born? See below:

If 14 years old, year of birth is:
2008 or 2009*

*It depends on whether he was born before or after 1 January 2009.

If now 14 years and his year of birth 2008 if he was born after 26 September 2008 until 31 december 2008 inclusively, and his year of birth is 2009 if he was born from 1 January 2009 to 26 September 2009.

Other examples:

If now 11 years, year of birth 2011 or 2012
If now 15 years, year of birth 2007 or 2008
If now 19 years, year of birth 2003 or 2004
If now 94 years, year of birth 1928 or 1929

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