145 years old now in 2023 - what year born?

Today, 1 December 2023 if a person is 145 years old now, what year was he born? See below:

If 145 years old, year of birth is:
1877 or 1878*

*It depends on whether he was born before or after 1 January 1878.

If now 145 years and his year of birth 1877 if he was born after 1 December 1877 until 31 december 1877 inclusively, and his year of birth is 1878 if he was born from 1 January 1878 to 1 December 1878.

Other examples:

If now 3 years, year of birth 2019 or 2020
If now 14 years, year of birth 2008 or 2009
If now 19 years, year of birth 2003 or 2004
If now 47 years, year of birth 1975 or 1976

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