137 years old now in 2025 - what year born?

Today, 23 January 2025 if a person is 137 years old now, what year was he born? See below:

If 137 years old, year of birth is:
1887 or 1888*

*It depends on whether he was born before or after 1 January 1888.

If now 137 years and his year of birth 1887 if he was born after 23 January 1887 until 31 december 1887 inclusively, and his year of birth is 1888 if he was born from 1 January 1888 to 23 January 1888.

Other examples:

If now 10 years, year of birth 2014 or 2015
If now 12 years, year of birth 2012 or 2013
If now 19 years, year of birth 2005 or 2006
If now 66 years, year of birth 1958 or 1959

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