136 years old now in 2025 - what year born?

Today, 19 December 2025 if a person is 136 years old now, what year was he born? See below:

If 136 years old, year of birth is:
1888 or 1889*

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

If now 136 years and his year of birth 1888 if he was born after 19 December 1888 until 31 december 1888 inclusively, and his year of birth is 1889 if he was born from 1 January 1889 to 19 December 1889.

Other examples:

If now 10 years, year of birth 2014 or 2015
If now 18 years, year of birth 2006 or 2007
If now 23 years, year of birth 2001 or 2002
If now 75 years, year of birth 1949 or 1950

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