I don't get people that can awake at one hour Mon-Fri and then magically sleep in to all hours on Sat/Sun. My body doesn't work like that.
My alarm goes at 6am Mon-Fri and on Saturday morning with no alarm I wake at the same time. It's all I can do to lay in to 7am.
Plus, the kitchen on your own early in the morning is a wonderful thing. Cup of tea, Charlie Parker, a fire if it's a tad chilly, the morning papers, perhaps a Madeleine or two to nibble on, hopefully the patter of rain on the glass roof to make you feel safe and cosey...