119 years old now in 2023 - what year born?

Today, 27 March 2023 if a person is 119 years old now, what year was he born? See below:

If 119 years old, year of birth is:
1903 or 1904*

*It depends on whether he was born before or after 1 January 1904.

If now 119 years and his year of birth 1903 if he was born after 27 March 1903 until 31 december 1903 inclusively, and his year of birth is 1904 if he was born from 1 January 1904 to 27 March 1904.

Other examples:

If now 9 years, year of birth 2013 or 2014
If now 18 years, year of birth 2004 or 2005
If now 30 years, year of birth 1992 or 1993
If now 47 years, year of birth 1975 or 1976

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