134 years old now in 2023 - what year born?

Today, 24 September 2023 if a person is 134 years old now, what year was he born? See below:

If 134 years old, year of birth is:
1888 or 1889*

*It depends on whether he was born before or after 1 January 1889.

If now 134 years and his year of birth 1888 if he was born after 24 September 1888 until 31 december 1888 inclusively, and his year of birth is 1889 if he was born from 1 January 1889 to 24 September 1889.

Other examples:

If now 3 years, year of birth 2019 or 2020
If now 15 years, year of birth 2007 or 2008
If now 23 years, year of birth 1999 or 2000
If now 38 years, year of birth 1984 or 1985

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