123 years old now in 2022 - what year born?


Today, 23 April 2022 if a person is 123 years old now, what year was he born? See below:


If 123 years old, year of birth is:
1898 or 1899*
*It depends on whether he was born before or after 1 January 1899.


If now 123 years and his year of birth 1898 if he was born after 23 April 1898 until 31 december 1898 inclusively, and his year of birth is 1899 if he was born from 1 January 1899 to 23 April 1899.


Other examples:

If now 3 years, year of birth 2018 or 2019
If now 17 years, year of birth 2004 or 2005
If now 25 years, year of birth 1996 or 1997
If now 83 years, year of birth 1938 or 1939

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