143 years old now in 2023 - what year born?

Today, 10 June 2023 if a person is 143 years old now, what year was he born? See below:

If 143 years old, year of birth is:
1879 or 1880*

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

If now 143 years and his year of birth 1879 if he was born after 10 June 1879 until 31 december 1879 inclusively, and his year of birth is 1880 if he was born from 1 January 1880 to 10 June 1880.

Other examples:

If now 8 years, year of birth 2014 or 2015
If now 18 years, year of birth 2004 or 2005
If now 28 years, year of birth 1994 or 1995
If now 60 years, year of birth 1962 or 1963

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