Two Sisters

Riddle: Two girls have the same parents and were born at the same hour of the same day of the same month, but they are not twins. How can this be possible?

Answer: They were not born in the same year. Source: https://www.riddles.com/4166

Two girls have the same parents and were born at the same hour of the same day of the same month, but they are not twins. How can this be possible? — two sisters by Palak patel Riddle