14 years old now in 2023 - what year born?

Today, 26 March 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 March 2008 until 31 december 2008 inclusively, and his year of birth is 2009 if he was born from 1 January 2009 to 26 March 2009.

Other examples:

If now 10 years, year of birth 2012 or 2013
If now 17 years, year of birth 2005 or 2006
If now 27 years, year of birth 1995 or 1996
If now 59 years, year of birth 1963 or 1964

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