70 years old now in 2026 - what year born?

Today, 28 October 2026 if a person is 70 years old now, what year was he born? See below:

If 70 years old, year of birth is:
1955 or 1956*

*It depends on whether he was born before or after 1 January 1956.

If now 70 years and his year of birth 1955 if he was born after 28 October 1955 until 31 december 1955 inclusively, and his year of birth is 1956 if he was born from 1 January 1956 to 28 October 1956.

Other examples:

If now 5 years, year of birth 2020 or 2021
If now 13 years, year of birth 2012 or 2013
If now 18 years, year of birth 2007 or 2008
If now 57 years, year of birth 1968 or 1969

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