So, I recently asked Patrick Rothfuss three questions. Here are his answers.
1. What are the days of the week?
"As for more particulars about the callendar [sic], keep an eye on the page. I'm going to post it up there before too long so you can see the days of the week and the months, etc."
2. How long is a span?
"A span is eleven days long."
3. If names are so important, then what is the name of the land you created?
"The name of the part of the world where the stories take place I generally think of as "The four corners." I'm undecided right now about the overall name..."
So there you have it. One solid answer, one "coming soon" answer, and one non-answer.