7 years old now in 2023 - what year born?

Today, 1 February 2023 if a person is 7 years old now, what year was he born? See below:

If 7 years old, year of birth is:
2015 or 2016*

*It depends on whether he was born before or after 1 January 2016.

If now 7 years and his year of birth 2015 if he was born after 1 February 2015 until 31 december 2015 inclusively, and his year of birth is 2016 if he was born from 1 January 2016 to 1 February 2016.

Other examples:

If now 8 years, year of birth 2014 or 2015
If now 14 years, year of birth 2008 or 2009
If now 24 years, year of birth 1998 or 1999
If now 84 years, year of birth 1938 or 1939

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