55 years old now in 2023 - what year born?

Today, 22 March 2023 if a person is 55 years old now, what year was he born? See below:

If 55 years old, year of birth is:
1967 or 1968*

*It depends on whether he was born before or after 1 January 1968.

If now 55 years and his year of birth 1967 if he was born after 22 March 1967 until 31 december 1967 inclusively, and his year of birth is 1968 if he was born from 1 January 1968 to 22 March 1968.

Other examples:

If now 7 years, year of birth 2015 or 2016
If now 16 years, year of birth 2006 or 2007
If now 20 years, year of birth 2002 or 2003
If now 94 years, year of birth 1928 or 1929

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