55 years old now in 2026 - what year born?

Today, 28 October 2026 if a person is 55 years old now, what year was he born? See below:

If 55 years old, year of birth is:
1970 or 1971*

*It depends on whether he was born before or after 1 January 1971.

If now 55 years and his year of birth 1970 if he was born after 28 October 1970 until 31 december 1970 inclusively, and his year of birth is 1971 if he was born from 1 January 1971 to 28 October 1971.

Other examples:

If now 11 years, year of birth 2014 or 2015
If now 18 years, year of birth 2007 or 2008
If now 24 years, year of birth 2001 or 2002
If now 93 years, year of birth 1932 or 1933

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