"उन्हाळी प्रमाणवेळ" च्या विविध आवृत्यांमधील फरक

[[Imageचित्र:Clepsydra-Diagram-Fancy.jpeg|thumb|upright|]]

[[Imageचित्र:Franklin-Benjamin-LOC-head.jpeg|thumb|upright=0.7|left|]]

[[Imageचित्र:G.V.-Hudson-Auckland-Islands-Party.jpeg|thumb|upright|left|]]

[[Imageचित्र:Begin CEST Transparent.png|thumb|upright=0.67|alt=Diagram of a clock showing a transition from 2:00 to 3:00.|When DST starts in [[central Europe]], clocks advance from 02:00 [[Central European Time|CET]] to 03:00 [[Central European Summer Time|CEST]].]]

[[Imageचित्र:End CEST Transparent.png|thumb|upright=0.67|alt=Diagram of a clock showing a transition from 3:00 to 2:00.|When DST ends in central Europe, clocks retreat from 03:00 CEST to 02:00 CET. Other regions switch at different times.]]

[[Imageचित्र:Time-differences-brz-us.png||thumb|left|alt=Time graph. The horizontal axis shows dates in 2008. The vertical axis shows the UTC offsets of eastern Brazil and eastern U.S. The difference between the two starts at 3 hours, then goes to 2 hours on February 17 at 24:00 Brazil eastern time, then goes to 1 hour on March 9 at 02:00 U.S. eastern time.|In early 2008 central Brazil was one, two, or three hours ahead of eastern U.S., depending on the date.]]

[[Imageचित्र:2007-02-20 time zones.svg|thumb|upright=1.67|alt=Map of the time zone boundaries of the world. Generally the borders run north-south and there are about 24 zones, but there are many exceptions where the borders follow national boundaries and a few half-hour or quarter-hour zones exist.|[[Time zones]] often lie west of their idealized boundaries, resulting in year-round DST.]]

[[Imageचित्र:William-Willett.jpg|thumb|right|upright|alt=A standing man in three-piece suit, facing camera. He is about 60 and is bald with a mustache. His left hand is in his pants pocket, and his right hand is in front of his chest, holding his pocket watch.|[[William Willett]] independently proposed DST in 1907 and advocated it tirelessly.<ref name=Prerau-22>{{vcite book |title=[[#Seize|Seize the Daylight]] |page=22 }}</ref>]]

[[Imageचित्र:Greenwich GB DaylightChart.png|upright=1.67|thumb|alt=Graph of sunrise and sunset times for 2007. The horizontal axis is the date; the vertical axis is the times of sunset and sunrise. There is a bulge in the center during summer, when sunrise is early and sunset late. There are step functions in spring and fall, when DST starts and stops.|Clock shifts affecting apparent sunrise and sunset times at [[Greenwich]] in 2007.<ref>{{vcite web |url=http://daylightchart.sourceforge.net/ |year=2008 |title=Daylight Chart |author=Sualeh Fatehi |publisher=SourceForge.net }}</ref>]]

[[Imageचित्र:Willett memorial.JPG|thumb|upright|alt=A standing stone in a grassy field surrounded by trees. The stone contains a vertical sundial centered on 1 o'clock, and is inscribed "HORAS NON NUMERO NISI ÆSTIVAS" and "SUMMER TIME ACT 1925".|The [[William Willett]] Memorial Sundial is always on DST.]]

[[Imageचित्र:Victory-Cigar-Congress-Passes-DST.jpeg|thumb|upright|alt=Poster titled "VICTORY! CONGRESS PASSES DAYLIGHT SAVING BILL" showing Uncle Sam turning a clock to daylight saving time as a clock-headed figure throws his hat in the air. The clock face of the figure reads "ONE HOUR OF EXTRA DAYLIGHT". The bottom caption says "Get Your Hoe Ready!"|Retailers generally favor DST. [[United Cigar Stores]] hailed a 1918 DST bill.]]

[[Imageचित्र:Daylightsavings.svg|thumb|upright|alt=Strong man in sandals and with shaggy hair, facing away from artist, grabbing a hand of a clock bigger than he is and forcing it backwards. The clock uses Roman numerals and the man is dressed in stripped-down Roman gladiator style. The text says "You can't stop time... But you can turn it back one hour at 2 a.m. on Oct. 28 when daylight-saving time ends and standard time begins."|A 2001 U.S. [[Public service advertising|public service advertisement]] reminded people to adjust clocks manually.]]

== बाह्य दुवे ==