117 years old now in 2022 - what year born?


Today, 18 June 2022 if a person is 117 years old now, what year was he born? See below:


If 117 years old, year of birth is:
1904 or 1905*
*It depends on whether he was born before or after 1 January 1905.


If now 117 years and his year of birth 1904 if he was born after 18 June 1904 until 31 december 1904 inclusively, and his year of birth is 1905 if he was born from 1 January 1905 to 18 June 1905.


Other examples:

If now 5 years, year of birth 2016 or 2017
If now 15 years, year of birth 2006 or 2007
If now 29 years, year of birth 1992 or 1993
If now 58 years, year of birth 1963 or 1964

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