13 years old now in 2022 - what year born?


Today, 14 May 2022 if a person is 13 years old now, what year was he born? See below:


If 13 years old, year of birth is:
2008 or 2009*
*It depends on whether he was born before or after 1 January 2009.


If now 13 years and his year of birth 2008 if he was born after 14 May 2008 until 31 december 2008 inclusively, and his year of birth is 2009 if he was born from 1 January 2009 to 14 May 2009.


Other examples:

If now 10 years, year of birth 2011 or 2012
If now 15 years, year of birth 2006 or 2007
If now 24 years, year of birth 1997 or 1998
If now 53 years, year of birth 1968 or 1969

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