Am pricing one just now where next month I'll pick up on a Friday morning and bring it back Tuesday morning. None of the CDPs will let me have the last day at weekend rate; it always prices 3 weekend days then one weekday. Ah, well. Still pretty cheap but I'm pretty sure I've seen it happen before as well. I think when I picked up at the airport (PIT) a while back and booked it as Saturday-Tuesday just in case, it gave me a weekend rate for Saturday-Tuesday. But on my test booking just now for HLE that I'm trying to use the Sat-Tues doesn't work. Moot for me anyway as I need to pick up Fri AM. The airport one was also very last minute so maybe that helped.