29 years old now in 2025 - what year born?

Today, 19 December 2025 if a person is 29 years old now, what year was he born? See below:

If 29 years old, year of birth is:
1995 or 1996*

*It depends on whether he was born before or after 1 January 1996.

If now 29 years and his year of birth 1995 if he was born after 19 December 1995 until 31 december 1995 inclusively, and his year of birth is 1996 if he was born from 1 January 1996 to 19 December 1996.

Other examples:

If now 6 years, year of birth 2018 or 2019
If now 15 years, year of birth 2009 or 2010
If now 21 years, year of birth 2003 or 2004
If now 96 years, year of birth 1928 or 1929

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