Time: Greenwich Mean Time

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PST

Daylight Saving Time  (DST)

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Canada: Changes in DST

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Originally that was done to conserve energy and later to pursue outdoor activities for a longer period of time. 

DST was adopted for the first time by the railroads in 1883 (The Canadian Encyclopedia Plus, by McClelland and Stewart Inc.). The old system of keeping time in major regions and cities was done according  through local astronomical conditions. The trains have made that obsolete. A need for a standardized time system was established in which  (Sir Sanford) Fleming played a key role. Fleming and others were instrumental in convening an International Prime Meridian Conference in Washington, in 1884, were they developed and adopted a system of "International Standard Time", which is still in use today.

DST was first conceived by Benjamin Franklin (portrait at left) during his sojourn as an American delegate in Paris in 1784, in an essay, "An Economical Project for Diminishing the Cost of Light". The essay was first published in the Journal de Paris on 1784-04-26. For more details go to: http://webexhibits.org/daylightsaving/franklin.html." But the real credit should be given to the London builder William Willet, (1865-1915). Willet took an early morning ride though Petts Wood, near Croydon, when he saw that all the blinds on the houses were closed, even so the sun was already shining brightly. In his pamphlet "The Waste Of Daylight" he wrote:

His campaign led to the introduction of "British Summer Time" in 1916, in an Act of Parliament. During the summer month, the clocks were set ahead by one hour Greenwich Mean Time (GMT - civilian) or Z = ZULU (military and aviation). Later it became known as "Double Summer Time". During WWII, the clocks remained ahead by one hour GMT during the winter.

During WWI several other countries adopted DST for reasons of energy and fuel savings. In the United States, the clocks were moved ahead by one hour from the standard time during WWII, (from February 9th, 1942 until September 30th, 1945), and no changes were made during the summer months.

In Canada:
Main article: Time in Canada
In Canada, time is under provincial and territorial jurisdiction, not federal. The governments of Ontario, Manitoba, Quebec, Prince Edward Island, New Brunswick, Alberta, the Northwest Territories, British Columbia, Nova Scotia and Yukon Territory have so far pledged to change their DST rules to match the new U.S. rules. Newfoundland has since also adopted legislation to implement the change.[8] In 2007, their DST will start on the second Sunday in March, and return to standard time on the first Sunday in November. Nunavut will continue to change time on the first Sunday in April and last Sunday in October unless it changes its legislation. As noted below, Saskatchewan does not recognize DST.

From Wikipedia, the free encyclopedia

		begins at 2:00 A.M. the second Sunday in March and
		ends at 2:00 A.M. on the first Sunday in November

In most countries in Western Europe, including members of the EEC, DST:

		begins at 1:00 A.M., GMT, the last Sunday in March and
		ends at 1:00 A.M., GMT, on the last Sunday in October

< /tr> YEAR DST, starts at 2:00 A.M. DST, ends at 2:00 A.M. 2004 April 4 October 31 2005 April 3 October 30 2006 April 2 October 29 2007 March 11 November 4 2008 March 9 November 2 2009 March 8 November 1 2010 March 14 November 7 2011 March 13 November 6 2012 March 11 November 4 2013 March 10 November 3 2014 March 9 November 2 2015 March 8 November 1 2016 March 13 November 6 2017 March 12 November 5 2018 March 11 November 4 2019 March 10 November 3

Links:
Benjamin Franklin
Sources for Time Zone and Daylight Saving Time Data
A Walk Through Time