94 years old now in 2025 - what year born?

Today, 19 December 2025 if a person is 94 years old now, what year was he born? See below:

If 94 years old, year of birth is:
1930 or 1931*

*It depends on whether he was born before or after 1 January 1931.

If now 94 years and his year of birth 1930 if he was born after 19 December 1930 until 31 december 1930 inclusively, and his year of birth is 1931 if he was born from 1 January 1931 to 19 December 1931.

Other examples:

If now 4 years, year of birth 2020 or 2021
If now 18 years, year of birth 2006 or 2007
If now 24 years, year of birth 2000 or 2001
If now 95 years, year of birth 1929 or 1930

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