114 years old now in 2023 - what year born?

Today, 30 November 2023 if a person is 114 years old now, what year was he born? See below:

If 114 years old, year of birth is:
1908 or 1909*

*It depends on whether he was born before or after 1 January 1909.

If now 114 years and his year of birth 1908 if he was born after 30 November 1908 until 31 december 1908 inclusively, and his year of birth is 1909 if he was born from 1 January 1909 to 30 November 1909.

Other examples:

If now 10 years, year of birth 2012 or 2013
If now 14 years, year of birth 2008 or 2009
If now 23 years, year of birth 1999 or 2000
If now 38 years, year of birth 1984 or 1985

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