96 years old now in 2023 - what year born?

Today, 27 March 2023 if a person is 96 years old now, what year was he born? See below:

If 96 years old, year of birth is:
1926 or 1927*

*It depends on whether he was born before or after 1 January 1927.

If now 96 years and his year of birth 1926 if he was born after 27 March 1926 until 31 december 1926 inclusively, and his year of birth is 1927 if he was born from 1 January 1927 to 27 March 1927.

Other examples:

If now 7 years, year of birth 2015 or 2016
If now 18 years, year of birth 2004 or 2005
If now 27 years, year of birth 1995 or 1996
If now 58 years, year of birth 1964 or 1965

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