When did people worship Hercules?

People worshipped Hercules primarily in ancient Greece and Rome, with his cult gaining prominence around the 5th century BCE. He was revered as a demigod and hero, celebrated for his strength and heroic feats. Temples and altars were dedicated to him, particularly in places like Thebes and Rome, where festivals and sacrifices were held in his honor. His worship continued into the Roman Empire, reflecting his enduring significance in classical mythology.