Just about 4:00 on Friday. Because we all know that the worst weekend will still trump even the best workday. No matter how sick or hurt I was at the beginning of my shift, by the time the hour hand finally managed to crawl around to the end of the day, all my aches and pains would somehow vanish. There’s no sound in the world that brings more smiles to our faces than the clank of a time clock on Friday afternoon.