It's now Daylight savings time in most of the US. People always say that you lose an hour of sleep on the night that we set our clocks ahead an hour. This is a stupid statement. Many people do not set their alarms on Sunday morning. They wake up whenever they wake up. It has nothing to do with what the clock says. They didn't lose an hour of sleep on Saturday night, though they probably lost an hour of their day on Sunday. Even if they did have to set their alarm on Sunday morning, they may have been smart and went to bed an hour early on Saturday night, in which case they would have lost an hour of their time on Saturday evening.