80 years old now in 2022 - what year born?


Today, 6 December 2022 if a person is 80 years old now, what year was he born? See below:


If 80 years old, year of birth is:
1941 or 1942*
*It depends on whether he was born before or after 1 January 1942.


If now 80 years and his year of birth 1941 if he was born after 6 December 1941 until 31 december 1941 inclusively, and his year of birth is 1942 if he was born from 1 January 1942 to 6 December 1942.


Other examples:

If now 7 years, year of birth 2014 or 2015
If now 18 years, year of birth 2003 or 2004
If now 21 years, year of birth 2000 or 2001
If now 65 years, year of birth 1956 or 1957

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