can, you're correct. I misunderstood the date of the 11th. Thanks for pointing that out. The 1-5 day referance come from our good friends at NORML, and here is their link so you can read the info yourself. http://www.norml.org/index.cfm?Group_ID=4934
You may want to dring an extra cup or two of coffee, or tea as ndhawk suggest, to dilute your urine a little bit and you should be good to go.