144 years old now in 2025 - what year born?

Today, 19 December 2025 if a person is 144 years old now, what year was he born? See below:

If 144 years old, year of birth is:
1880 or 1881*

*It depends on whether he was born before or after 1 January 1881.

If now 144 years and his year of birth 1880 if he was born after 19 December 1880 until 31 december 1880 inclusively, and his year of birth is 1881 if he was born from 1 January 1881 to 19 December 1881.

Other examples:

If now 5 years, year of birth 2019 or 2020
If now 12 years, year of birth 2012 or 2013
If now 26 years, year of birth 1998 or 1999
If now 70 years, year of birth 1954 or 1955

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