148 years old now in 2023 - what year born?

Today, 23 September 2023 if a person is 148 years old now, what year was he born? See below:

If 148 years old, year of birth is:
1874 or 1875*

*It depends on whether he was born before or after 1 January 1875.

If now 148 years and his year of birth 1874 if he was born after 23 September 1874 until 31 december 1874 inclusively, and his year of birth is 1875 if he was born from 1 January 1875 to 23 September 1875.

Other examples:

If now 7 years, year of birth 2015 or 2016
If now 15 years, year of birth 2007 or 2008
If now 20 years, year of birth 2002 or 2003
If now 43 years, year of birth 1979 or 1980

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