Snow Lag?

Well I must be suffering from something...
I got up early this morning, had a shower and washed my hair using my new shampoo (more about that at another time), got dressed and left the house. I drove for fifteen minutes and found myself a parking space; I put several £'s into the meter and put the ticket on the car. I walked the ten minute journey and opened the door; I smiled and said hello to my hairdresser. She replied with a somewhat perplexed look and told me my appointment is tomorrow!