64 years old now in 2022 - what year born?


Today, 5 December 2022 if a person is 64 years old now, what year was he born? See below:


If 64 years old, year of birth is:
1957 or 1958*
*It depends on whether he was born before or after 1 January 1958.


If now 64 years and his year of birth 1957 if he was born after 5 December 1957 until 31 december 1957 inclusively, and his year of birth is 1958 if he was born from 1 January 1958 to 5 December 1958.


Other examples:

If now 7 years, year of birth 2014 or 2015
If now 12 years, year of birth 2009 or 2010
If now 29 years, year of birth 1992 or 1993
If now 77 years, year of birth 1944 or 1945

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