Myth is a genre of folklore consisting primarily of narratives that play a fundamental role in a society. For scholars, this is very different from the vernacular usage of the term "myth", referring to a belief that is not true, for the veracity of folklore is not a defining criterion of it being myth. . Myths are often endorsed by religious (when they are closely linked to religion or spirituality) and secular authorities. Many societies group their myths, legends, and history together, considering myths and legends to be factual accounts of their remote past.
https://en.wikipedia.org/wiki/Myth