They change time twice each year. To date, no real evidence is available that would document the claim. What energy is saved at the beginning of a day is lost at the end. However, this shift in the circadian rhythm may be wonderful for getting in an extra round of golf. This seems to be the more logical explanation for why the politicians guard the ability to change the clocks every spring and fall.
Children are very sensitive to any change in their schedules.
When time change happens, they spend weeks adjusting their bodies to accommodate the earlier hour for waking. Time change is causing havoc in the classroom. Children become grouchy. They cannot focus on lessons. Teachers are also coping with physical discomfort and irritability.