Historical clue formulations

• Seattle N.H.L. team — 2026-01-15
• N.H.L. team with a mythological eponym — 2024-02-20
• Legendary sea monster — 2020-11-22
• Sea monster of Norse myth — 2015-08-19
• Supposed sighting off the coast of Norway — 2013-10-19
• Monster of Norse myth — 2011-07-17