150 years old now in 2025 - what year born?

Today, 19 December 2025 if a person is 150 years old now, what year was he born? See below:

If 150 years old, year of birth is:
1874 or 1875*

*It depends on whether he was born before or after 1 January 1875.

If now 150 years and his year of birth 1874 if he was born after 19 December 1874 until 31 december 1874 inclusively, and his year of birth is 1875 if he was born from 1 January 1875 to 19 December 1875.

Other examples:

If now 4 years, year of birth 2020 or 2021
If now 16 years, year of birth 2008 or 2009
If now 29 years, year of birth 1995 or 1996
If now 68 years, year of birth 1956 or 1957

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