97 years old now in 2021 - what year born?


Today, 7 May 2021 if a person is 97 years old now, what year was he born? See below:


If 97 years old, year of birth is:
1923 or 1924*
*It depends on whether he was born before or after 1 January 1924.


If now 97 years and his year of birth 1923 if he was born after 7 May 1923 until 31 december 1923 inclusively, and his year of birth is 1924 if he was born from 1 January 1924 to 7 May 1924.


Other examples:

If now 10 years, year of birth 2010 or 2011
If now 12 years, year of birth 2008 or 2009
If now 28 years, year of birth 1992 or 1993
If now 65 years, year of birth 1955 or 1956

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