8 years old now in 2023 - what year born?

Today, 26 March 2023 if a person is 8 years old now, what year was he born? See below:

If 8 years old, year of birth is:
2014 or 2015*

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

If now 8 years and his year of birth 2014 if he was born after 26 March 2014 until 31 december 2014 inclusively, and his year of birth is 2015 if he was born from 1 January 2015 to 26 March 2015.

Other examples:

If now 11 years, year of birth 2011 or 2012
If now 18 years, year of birth 2004 or 2005
If now 22 years, year of birth 2000 or 2001
If now 81 years, year of birth 1941 or 1942

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