16 years old now in 2022 - what year born?

Today, 27 September 2022 if a person is 16 years old now, what year was he born? See below:

If 16 years old, year of birth is:
2005 or 2006*

*It depends on whether he was born before or after 1 January 2006.

If now 16 years and his year of birth 2005 if he was born after 27 September 2005 until 31 december 2005 inclusively, and his year of birth is 2006 if he was born from 1 January 2006 to 27 September 2006.

Other examples:

If now 6 years, year of birth 2015 or 2016
If now 14 years, year of birth 2007 or 2008
If now 18 years, year of birth 2003 or 2004
If now 47 years, year of birth 1974 or 1975

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