149 years old now in 2025 - what year born?

Today, 19 December 2025 if a person is 149 years old now, what year was he born? See below:

If 149 years old, year of birth is:
1875 or 1876*

*It depends on whether he was born before or after 1 January 1876.

If now 149 years and his year of birth 1875 if he was born after 19 December 1875 until 31 december 1875 inclusively, and his year of birth is 1876 if he was born from 1 January 1876 to 19 December 1876.

Other examples:

If now 4 years, year of birth 2020 or 2021
If now 13 years, year of birth 2011 or 2012
If now 22 years, year of birth 2002 or 2003
If now 80 years, year of birth 1944 or 1945

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