Daylight Saving Time
|
|
Daylight Saving Time |
|
Daylight Saving Time (also known as Summer Time) is local standard time adjusted to achieve longer evening daylight, especially in summer, by setting clocks one hour ahead of local standard time. In Daylight Saving Time, the sun rises one hour later in the morning, and sets one hour later in the evening. This has the principal benefit of saving energy, as less artificial light is needed during the evening. Later in the year, Daylight Saving Time is ended, and clocks are set back, returning them to standard local time. The date on which Daylight Saving Time begins or ends is called the Transition.
For a lighting system installed on a ship, Daylight Saving Time is complicated for several reasons:
Some countries do not use Daylight Saving Time, or use it in differing ways.
Some countries may change Transition, if circumstances make it advantageous.
Daylight Saving Time is a seasonal event. This means that while countries in the northern hemisphere are having summer, countries in the southern hemisphere are having winter. Hence, different countries may use Daylight Saving Time at different times of the year.
Daylight Saving Time is a regional event, with neighbouring countries setting different local Daylight Saving Times. Furthermore, some countries near the equator do not use it at all as the hours of daylight vary insufficiently to require it.
Tip:
|