115 years old now in 2024 - what year born?


Today, 21 May 2024 if a person is 115 years old now, what year was he born? See below:


If 115 years old, year of birth is:
1908 or 1909*
*It depends on whether he was born before or after 1 January 1909.


If now 115 years and his year of birth 1908 if he was born after 21 May 1908 until 31 december 1908 inclusively, and his year of birth is 1909 if he was born from 1 January 1909 to 21 May 1909.


Other examples:

If now 6 years, year of birth 2017 or 2018
If now 12 years, year of birth 2011 or 2012
If now 29 years, year of birth 1994 or 1995
If now 45 years, year of birth 1978 or 1979

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