143 years old now in 2025 - what year born?

Today, 21 May 2025 if a person is 143 years old now, what year was he born? See below:

If 143 years old, year of birth is:
1881 or 1882*

*It depends on whether he was born before or after 1 January 1882.

If now 143 years and his year of birth 1881 if he was born after 21 May 1881 until 31 december 1881 inclusively, and his year of birth is 1882 if he was born from 1 January 1882 to 21 May 1882.

Other examples:

If now 5 years, year of birth 2019 or 2020
If now 15 years, year of birth 2009 or 2010
If now 30 years, year of birth 1994 or 1995
If now 42 years, year of birth 1982 or 1983

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