129 years old now in 2022 - what year born?


Today, 8 January 2022 if a person is 129 years old now, what year was he born? See below:


If 129 years old, year of birth is:
1892 or 1893*
*It depends on whether he was born before or after 1 January 1893.


If now 129 years and his year of birth 1892 if he was born after 8 January 1892 until 31 december 1892 inclusively, and his year of birth is 1893 if he was born from 1 January 1893 to 8 January 1893.


Other examples:

If now 6 years, year of birth 2015 or 2016
If now 17 years, year of birth 2004 or 2005
If now 27 years, year of birth 1994 or 1995
If now 94 years, year of birth 1927 or 1928

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