There are calls to end semi-annual practice of putting our clocks backwards and forwards an hour. It is done by forwarding clocks by one hour in spring so that evening daylight lasts hour longer and then putting them back in autumn. This is done in many parts of world and is called Daylight Saving Time (DST). Scientists are questioning value of tinkering with time. They say changing clocks could actually be harmful to our health and increase energy costs. states of California and Massachusetts in the USA are considering unilaterally abandoning DST. Lawmakers there feel it has no relevance today when we have electric lights and people work around clock.
Those in support of DST argue that it saves energy because lights are turned on later. They argue it promotes outdoor leisure activities in summer evening, and is therefore good for physical and psychological health. They also say it reduces traffic accidents and crime. People who tend to support DST are city workers, retail businesses, outdoor sports enthusiasts and businesses, tour operators, and others who benefit from increased light during evening in summer. Opponents say it increases energy costs and causes health risks. incidence of heart attacks and strokes can increase due to changes in circadian cycle (our body clock). With less rest, people make more mistakes, so accidents increase.