145 years old now in 2025 - what year born?

Today, 18 January 2025 if a person is 145 years old now, what year was he born? See below:

If 145 years old, year of birth is:
1879 or 1880*

*It depends on whether he was born before or after 1 January 1880.

If now 145 years and his year of birth 1879 if he was born after 18 January 1879 until 31 december 1879 inclusively, and his year of birth is 1880 if he was born from 1 January 1880 to 18 January 1880.

Other examples:

If now 9 years, year of birth 2015 or 2016
If now 12 years, year of birth 2012 or 2013
If now 21 years, year of birth 2003 or 2004
If now 57 years, year of birth 1967 or 1968

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