Where do the clocks change?

The following world map shows where the clocks change. In the US, Daylight Saving Time is observed everywhere except Arizona and Hawaii. The clocks change mostly throughout Europe. Asia, the most populous continent, does not observe Daylight Saving Time. So in addition to asking "when does the time change?" you may ask "does the time change at all where I am?":

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History of Daylight Saving Time

The earliest mention of a formal "changing of the clocks" goes all the way back to the 1800s. Back then, an entomologist ("bug doctor") named George Hudson wanted more time after work to gather bugs. Hence, in 1895 he wrote a paper proposing the clocks move forward by two hours in the summer. Surprisingly, people thought this was a good idea (me must have been quite the persuader).

The Englishman William Willett also proposed a summer clock change in 1905. His proposal gained traction, and was taken up by a member of parliament and the bill was introduced in 1908. The bill was ultimately defeated, but Willett never gave up trying. He died without ever hearing the common refrain "when do the clocks change??".

So initially the idea was not well received. But war has a way of forcing unpopular ideas on the masses. And so it was that during World War I, Germany and the Axis Powers began to use daylight savings time (Sommerzeit! = summer time in German) to conserve resources, around 1916. That is, if the people are awake during the day and asleep at night, they will need less heat and lights, etc.

Apparently, the economics worked out and England and the European allies took on the system. The United States decided it was worth doing in 1918. And the rest is history.

Location Specific Time Change Information

When Does the Time Change in Arizona?

When Does the Time Change in California?

When Does the Time Change in Hawaii?

When Does the Time Change in 2012?

When Does the Time Change in 2013?

When Does the Time Change in 2014?

When Does the Time Change in 2015?

When Does the Time Change in 2016?

When Does the Time Change in 2017?

When Does the Time Change in 2018?

When Does the Time Change in 2019?

When Does the Time Change in 2020?

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