Elder Scrolls Lore

Hermaeus Mora is the Daedric Prince of knowledge, memory and fate. Unlike most other Daedric Princes, he represents himself not in a human/humanoid form but as a mass of tentacles. His Plane of Oblivion is known as ‘Apocrypha’, a sombre land realm filled with endless halls of books and libraries, and strange lesser Daedra known as Lurkers and Seekers. His most notable Daedric Artefact is the Oghma Infinium, essentially a book of powerful knowledge. He also has Black Books, which are essentially portals to his realm. A notable exploit of the Daedric Prince is with the Dragon Priest Miraak, whom attempts to take over Solstheim but is defeated by the Last Dragonborn. He is a heavily neutral Daedric Prince, having and giving both helpful and destructive knowledge.

The calendars used in Arena and Daggerfall are entirely different. Morrowind’s is pretty much the same, besides Sun’s Dusk and Frostfall having swapped number of days, and the negligence of Morning Star (this was possibly a mistake made during the game’s production).