77 years old now in 2026 - what year born?

Today, 28 October 2026 if a person is 77 years old now, what year was he born? See below:

If 77 years old, year of birth is:
1948 or 1949*

*It depends on whether he was born before or after 1 January 1949.

If now 77 years and his year of birth 1948 if he was born after 28 October 1948 until 31 december 1948 inclusively, and his year of birth is 1949 if he was born from 1 January 1949 to 28 October 1949.

Other examples:

If now 7 years, year of birth 2018 or 2019
If now 16 years, year of birth 2009 or 2010
If now 28 years, year of birth 1997 or 1998
If now 35 years, year of birth 1990 or 1991

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