One week could compose of 5 days, or so, whatever, that would allow us to have some nice historical variety and whatnot

And something like different times of the year, that would be a lot far fetched I suppose, but is nothing to not concider I'd suppose

Having luck as a skill, we might have birth of characters, zodiac signs, certain zodiacal amulets, which would strenghten their powers during certain times of the year, supposedly a character is born/created in the 5th out of 7 months in the year, and he gains a zodiac sign of say Pinkie (lol) and upon that, he has skills similar to it, that'd be gets an affinity in dexterity, and a loss at strength, such stuff would certainly breathe some life into the currently imo dull character creation system.
Let me know what you think about it.