What is the difference between summer time and standard time: here are all the details! From the date on which you switch to solar time to that on which daylight saving time starts.
Before seeing what thedifference between summer time and standard time, let's clarify the concept oftime zone and daylight saving time.
Summer time, what is it
L'daylight savings timeit is what a state chooses by convention. L'winter timeit is astronomically stable by the passage of the Sun through the local meridian. When the sun reaches the highest point of its trajectory in the sky, it is noon there. Each meridian, therefore, has its own specific solar time.
For convenience, every nation adopts, throughout the territory, a single hour, generally thewinter timepresent in the capital.
In 1884, to alleviate the chronological gap between the various states, the Washington conference examined the system ofdaylight savings time.
This system divides the Earth into 24cloves, all equal. Such wedges are better defined as"Fused“: This is how the concept oftime zone.
In Italy, fordaylight savings timewe mean the one we use in the summer. That is, the 60-minute shift forward, established by law, from the time normally in force.
When daylight saving time starts
If you are wondering when to put "Clock hands forward by one hour", the answer is the last Sunday in March.
L'summer time 2019, therefore, shoot in the night between Saturday 30 and Sunday 31 March.
When solar time strikes
In the countries of the European Union and in Switzerland, daylight saving time begins on the last Sunday in March and ends on the last Sunday in October.
To turn the clock back by one hour, you will have to wait until the last Sunday in October. For 2019, the transition from summer time to winter time will take place on the night between Saturday 26 and Sunday 27 October.
Difference between summer time and standard time
L'daylight savings timeis the one in effect intime zoneto which our country belongs. During the summer, a state can adhere to the convention and move the hands of the clocks forward by one hour.
L'daylight savings timeis the term used to refer to the system used, by convention, in summer. With termwinter time, instead, reference is made to the system used in the winter period.
Technically, thewinter timeit would be different in every point of the terrestrial globe as it refers to the position of the sun along its trajectory in the celestial vault.
Generally, when the time coincides with that oftime zonereference, it is calledwinter time(at least here in Italy), orconventional civil time.
In our country we have kept the terminology "solar time and summer time "even if technically, thewinter time(summer time) does not exactly correspond to astronomical solar time. In many other countries, clearer and more direct terminology is used, in fact we speak ofsummer timeiswinter time.
Why do we set the clock back one hour in winter?
The purpose of the time change is to recover daylight. For this reason, in England it is spoken ofDST,acronym forDaylight saving time, daylight saving time.
Summer time and winter time, advantages and disadvantages
Switching to summer time allows us tosave electricitythanks to less use of artificial lighting. If you are interested in tips for maximizing domestic electrical efficiency, you can read the page on how save electricity in the house. L'daylight savings time, of course, it cannot increase the hours of light available within 24 hours ... it can, however, induce greater use of the hours of light that would otherwise be "wasted "due to our "sleep - wake" habits.
The use ofdaylight savings time, from 2004 to 2012 alone, it allowed an electricity saving of over 6 billion kilowatt hours, an equally welcome economic saving: the reduction in electricity costs allowed Italian users to save money of nine hundred million euros.
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