121 years old now in 2024 - what year born?


Today, 18 May 2024 if a person is 121 years old now, what year was he born? See below:


If 121 years old, year of birth is:
1902 or 1903*
*It depends on whether he was born before or after 1 January 1903.


If now 121 years and his year of birth 1902 if he was born after 18 May 1902 until 31 december 1902 inclusively, and his year of birth is 1903 if he was born from 1 January 1903 to 18 May 1903.


Other examples:

If now 5 years, year of birth 2018 or 2019
If now 18 years, year of birth 2005 or 2006
If now 29 years, year of birth 1994 or 1995
If now 91 years, year of birth 1932 or 1933

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