109 years old now in 2024 - what year born?


Today, 20 April 2024 if a person is 109 years old now, what year was he born? See below:


If 109 years old, year of birth is:
1914 or 1915*
*It depends on whether he was born before or after 1 January 1915.


If now 109 years and his year of birth 1914 if he was born after 20 April 1914 until 31 december 1914 inclusively, and his year of birth is 1915 if he was born from 1 January 1915 to 20 April 1915.


Other examples:

If now 7 years, year of birth 2016 or 2017
If now 15 years, year of birth 2008 or 2009
If now 21 years, year of birth 2002 or 2003
If now 71 years, year of birth 1952 or 1953

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