Daylight Saving Time

Daylight saving time (DST) is the practice of advancing clocks to make better use of longer daylight hours during summer, typically by setting clocks forward one hour in spring and back one hour in autumn. Only 34% of the world's countries observe DST, with implementation varying by region and country. Historically, several ancient societies made seasonal changes to their timekeeping, but the first realistic proposal for changing clocks was made by George Hudson in 1895, and the first implementation of DST was by Port Arthur, Ontario, Canada, in 1908. The rationale for DST is to make better use of daylight during summer, but it is of little use near the Equator, where daylight hours vary little throughout the year.learn more on wikipedia