https://en.wiktionary.org/wiki/hour : "daie" or "daye"
Core issue: no way to tell if the game means "in-game" or "IRL" when something takes X hours. (The notification you get from building a Personal claim is the only exception I'm sure of, it specifies "one in-game day" which corresponds to 7 hours and 18 minutes of real time.)
[EDIT] alternative solution:
MooCow wrote:r0ck4ev3r wrote:Däys or Wëëks
Best suggestion I've seen so far.
- Unambiguously different from real word
- Recognisable references to day/week without additional information
- Looks good