Thor is the hot-tempered god of thunder in Norse mythology, the son of the chief god, Odin, and goddess of the earth, Fjorgyn. As a strong and courageous warrior, Thor was the protector of both gods and humans. Lightning bolts flew from his hammer Mjöllnir as he slew enemies, but it could also be used to heal and revive. Thor was so revered that when the Anglo-Saxons adopted the Roman calendar, they named the fifth day of the week 'Thursday', after him.