109 years old now in 2025 - what year born?


Today, 8 July 2025 if a person is 109 years old now, what year was he born? See below:


If 109 years old, year of birth is:
1915 or 1916*
*It depends on whether he was born before or after 1 January 1916.


If now 109 years and his year of birth 1915 if he was born after 8 July 1915 until 31 december 1915 inclusively, and his year of birth is 1916 if he was born from 1 January 1916 to 8 July 1916.


Other examples:

If now 11 years, year of birth 2013 or 2014
If now 14 years, year of birth 2010 or 2011
If now 18 years, year of birth 2006 or 2007
If now 66 years, year of birth 1958 or 1959

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