29 years old now in 2024 - what year born?

Today, 4 December 2024 if a person is 29 years old now, what year was he born? See below:

If 29 years old, year of birth is:
1994 or 1995*

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

If now 29 years and his year of birth 1994 if he was born after 4 December 1994 until 31 december 1994 inclusively, and his year of birth is 1995 if he was born from 1 January 1995 to 4 December 1995.

Other examples:

If now 6 years, year of birth 2017 or 2018
If now 12 years, year of birth 2011 or 2012
If now 23 years, year of birth 2000 or 2001
If now 49 years, year of birth 1974 or 1975

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