I wrote the setting as you might remember, but didn't give the weekdays a name, mostly because there was so much to do that I never got around to it. My thoughts:
I do agree that religious naming of the days would only make sense locally, but would be fine there. Some probably think this would be a mess, but to me that is really part of the setting, which also applies to the discussion elsewhere about selling stuff – Ravenland is a after all a boiling cauldron of incompatible ingredients. In commerce I assume that valuation and demand of goods as well as local rules, systems of measurements etc would differ significantly. I hope this might be seen as an ingredient in adventuring rather than as hinderance.
Concerning naming of days, I would assume that:
* Wolfkin, ogres, lizardkin and probably elves don't name days at all since they don't see the point of this.
* Goblins might call all days ”The Blind”, but might name week-nights after animals.
* Humans might use generic naming of days based on practices but with local, sometimes religious variations. (In Swedish för instance saturday – ”lördag” – derives from ”lögardag” – ”the day to wash yourself”). Perhaps:
1. Sunday (because every day starts with the sun arriving – for preparation, reading omens and speaking to the skies)
2. Moonday (because the moon concludes and complements the day – for magic, secrets, mysticism etc)
3. Blood day (when you go to war or slaughter animals) – renamed as Rust day by the Rust brothers.
4. Earthday (for growing, fertilizing, sex etc)
5. Growth day (for accomplishment, education, building etc)
6. Harvest day (For collecting, bartering, eating good etc)
7. Stillday (for contemplation, prayer, cleansing, reevaluation, counsel and decisions)
* Dwarves use human practices when necessary but tend to measure time in accomplishments rather than days since these don't make much sense anyway underground. It might be considered undwarvly and even heretic to care about days passing – Huge's hearth is always burning and the world naturally rotates like a sword being forged to be evenly heated.