48 years old now in 2026 - what year born?

Today, 28 October 2026 if a person is 48 years old now, what year was he born? See below:

If 48 years old, year of birth is:
1977 or 1978*

*It depends on whether he was born before or after 1 January 1978.

If now 48 years and his year of birth 1977 if he was born after 28 October 1977 until 31 december 1977 inclusively, and his year of birth is 1978 if he was born from 1 January 1978 to 28 October 1978.

Other examples:

If now 10 years, year of birth 2015 or 2016
If now 12 years, year of birth 2013 or 2014
If now 24 years, year of birth 2001 or 2002
If now 41 years, year of birth 1984 or 1985

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