Daylight savings time schedule

Daylight Saving Time (DST, the DST in British English, see terminology) is the convention to promote the clocks so that afternoons have more daylight and mornings have less. Typically clocks are set forward one hour near the beginning of spring and are adjusted backward in autumn. Modern DST was first In 1907 the British builder William Willett. Many countries have since then, depending on the location information and occasionally change.

The practice is controversial. Adding daylight to afternoons benefits retailing, sports and other activities that sunlight after work, but caused problems for agriculture, entertainment and other activities in the sun. Extra noon daylight reduces the number of deaths, its effects on health and crime is less clear. Although an early summer evening goal was for the use of incandescent lighting, formerly a primary use of electricity, modern heating and cooling usage patterns are very different and research, such as DST currently affects the energy is limited and contradictory.

DST-the-clock shifts can serve as fire safety reminders , but they complicate time measurement and can disrupt meetings, travel, payroll, management, medical equipment, and heavy equipment. Many computer-based systems can their clocks automatically, but this may be limited and prone to error, especially when DST rules change .