c. 624–544 BCE (traditional long chronology; Sri Lanka & SE Asia)
One traditional dating system, based on Sri Lankan chronicles, places the Buddha’s 80-year lifespan in this period (computed from the claim that he died 218 years before Ashoka’s coronation, with Ashoka crowned in 326 BCE in this scheme).
c. 566–486 BCE (long chronology with Ashoka crowned c. 268 BCE)
Many scholars who accept the long chronology but date Ashoka’s coronation around 268 BCE infer a later long-chronology lifespan for the Buddha in this range.