In modern standard Arabic, recurrences of the term qarn (pl. qurun), of the root q-r-n, revolve around two meanings: a "horn" or "one hundred years."2 The association of qarn with "horn" is borrowed from the animal domain due to the eye-catching sight oft he animal's horns. Hence, the etymology of qarn is based on the notion that two things are situated parallel to each other. This study, however, will not examine the first meaning of qarn, but instead focus on the second. The attestations of qarn in early Islamic sources point to a composite term that retained a wide range of meanings and interpretations. More importantly, the number of years that qarn denoted was controversial among early Muslim scholars, and it underwent several transformations before it finally came to be associated with "one hundred years."