7 years old now in 2026 - what year born?

Today, 28 October 2026 if a person is 7 years old now, what year was he born? See below:

If 7 years old, year of birth is:
2018 or 2019*

*It depends on whether he was born before or after 1 January 2019.

If now 7 years and his year of birth 2018 if he was born after 28 October 2018 until 31 december 2018 inclusively, and his year of birth is 2019 if he was born from 1 January 2019 to 28 October 2019.

Other examples:

If now 6 years, year of birth 2019 or 2020
If now 17 years, year of birth 2008 or 2009
If now 20 years, year of birth 2005 or 2006
If now 96 years, year of birth 1929 or 1930

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