128 years old now in 2021 - what year born?


Today, 14 September 2021 if a person is 128 years old now, what year was he born? See below:


If 128 years old, year of birth is:
1892 or 1893*
*It depends on whether he was born before or after 1 January 1893.


If now 128 years and his year of birth 1892 if he was born after 14 September 1892 until 31 december 1892 inclusively, and his year of birth is 1893 if he was born from 1 January 1893 to 14 September 1893.


Other examples:

If now 10 years, year of birth 2010 or 2011
If now 17 years, year of birth 2003 or 2004
If now 26 years, year of birth 1994 or 1995
If now 92 years, year of birth 1928 or 1929

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