137 years old now in 2022 - what year born?

Today, 5 December 2022 if a person is 137 years old now, what year was he born? See below:

If 137 years old, year of birth is:
1884 or 1885*

*It depends on whether he was born before or after 1 January 1885.

If now 137 years and his year of birth 1884 if he was born after 5 December 1884 until 31 december 1884 inclusively, and his year of birth is 1885 if he was born from 1 January 1885 to 5 December 1885.

Other examples:

If now 8 years, year of birth 2013 or 2014
If now 18 years, year of birth 2003 or 2004
If now 26 years, year of birth 1995 or 1996
If now 41 years, year of birth 1980 or 1981

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