Wednesday
see also
weekdays 

The astrological sign of the planet Mercury represents Wednesday, which was dies mercurii to the Romans. In English, this became Woden's Day, since the Roman god Mercury was identified with Woden (or Odin) in northern Europe. 

In Norse mythology, Odin is the supreme god. His role, like many of the Norse pantheon, is complex: he is both god of wisdom and war, roles not necessarily conceived of as being mutually sympathetic in contemporary society. His name has roots in the old Norse word örðr, meaning "inspiration, madness, anger". 

His name, for the warlike Norsemen, was synonymous with battle and warfare, for it recurs throughout the myths as the bringer of victory. Odin is a shape-changer, able to change his skin and form in any way he liked. He is said to travel the world disguised as an old man with a staff, one-eyed, gray-bearded and wearing a wide-brimmed hat (called Odin Gangleri ("the wanderer"). 
From: Wikipedia

  Songs referenced: 

Wednesday