110 years old now in 2023 - what year born?

Today, 10 June 2023 if a person is 110 years old now, what year was he born? See below:

If 110 years old, year of birth is:
1912 or 1913*

*It depends on whether he was born before or after 1 January 1913.

If now 110 years and his year of birth 1912 if he was born after 10 June 1912 until 31 december 1912 inclusively, and his year of birth is 1913 if he was born from 1 January 1913 to 10 June 1913.

Other examples:

If now 6 years, year of birth 2016 or 2017
If now 18 years, year of birth 2004 or 2005
If now 22 years, year of birth 2000 or 2001
If now 80 years, year of birth 1942 or 1943

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