Late for work

I woke today at 10:15pm that's when I usually leave for work. In my mind I thought it was 11:15pm, I clock into work at 11pm, so I thought I was late. I pick up my phone dial my suprivisors cell number it rings twice I realize its 10 not 11pm think full he didn't answer the phone. He would have said OK but I will have to point you, and when I arrived at work he would have said I thought you where going to be late, and I would have explained my situation and his reply would have been you are from clay county that explains why. (in a joking manor) I didn't get much sleep I went to bed at 6pm.