28 years old now in 2023 - what year born?

Today, 1 December 2023 if a person is 28 years old now, what year was he born? See below:

If 28 years old, year of birth is:
1994 or 1995*

*It depends on whether he was born before or after 1 January 1995.

If now 28 years and his year of birth 1994 if he was born after 1 December 1994 until 31 december 1994 inclusively, and his year of birth is 1995 if he was born from 1 January 1995 to 1 December 1995.

Other examples:

If now 10 years, year of birth 2012 or 2013
If now 16 years, year of birth 2006 or 2007
If now 21 years, year of birth 2001 or 2002
If now 44 years, year of birth 1978 or 1979

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