Good old Saturn. And a little bonus quote for you from that link:
Its name is unique among the names of days, in that it is derived from the Roman god Saturn, while the other six names are derived from Saxon gods.
+ My overwhelming impression following The Tour over the past 24 hours is that it's a challenge of how strong you are and how much pain you can inflict on yourself. Do you enjoy putting it onto others enough to outweigh the pain your enduring? And Lance does. Mighty Lance put almost a minute into his closest competitor, Basso dropped back a very little, and Ullrich more than that.