46 years old now in 2022 - what year born?

Today, 27 September 2022 if a person is 46 years old now, what year was he born? See below:

If 46 years old, year of birth is:
1975 or 1976*

*It depends on whether he was born before or after 1 January 1976.

If now 46 years and his year of birth 1975 if he was born after 27 September 1975 until 31 december 1975 inclusively, and his year of birth is 1976 if he was born from 1 January 1976 to 27 September 1976.

Other examples:

If now 11 years, year of birth 2010 or 2011
If now 17 years, year of birth 2004 or 2005
If now 29 years, year of birth 1992 or 1993
If now 65 years, year of birth 1956 or 1957

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