22 years old now in 2025 - what year born?

Today, 23 January 2025 if a person is 22 years old now, what year was he born? See below:

If 22 years old, year of birth is:
2002 or 2003*

*It depends on whether he was born before or after 1 January 2003.

If now 22 years and his year of birth 2002 if he was born after 23 January 2002 until 31 december 2002 inclusively, and his year of birth is 2003 if he was born from 1 January 2003 to 23 January 2003.

Other examples:

If now 10 years, year of birth 2014 or 2015
If now 16 years, year of birth 2008 or 2009
If now 21 years, year of birth 2003 or 2004
If now 56 years, year of birth 1968 or 1969

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