'Twelves' is short for twelve-days. The aughisky use a twelve-day week as well as a base-twelve counting system. Another reason why Turnspit has no hope of figuring out his own calendar -- he's missing a *lot* of time, and the two calendars are incompatible.

And really, aughisky are a lot wierder than Turnspit is used to. I should go back to when he was left at Brewster's Holding soon, just so you see the shock.