than they would have been otherwise. They will begin and complete daily work routines an hour earlier; in most cases, they will have the hour of daylight that was shifted from the morning available to them after their workday activities.

The clock shift is partly motivated by practicality. At the summer solstice, in American temperate latitudes, for example, the sun rises around 04:30 standard time and sets around 19:30. Since most people are asleep at 04:30, it is seen as practical to treat 04:30 as if it were 05:30, thereby allowing