Tim Yeo | [Let's set the clocks ahead two hours, because that will increase tourism and prevent bad weather!]

Last but not least the British Tourist Authority has estimated that a change to SDST would increase turnover in tourism by over £1bn and extend the tourist season. Tourist attractions and sports facilities, many of which are capable of creating lots of new jobs, could stay open later to boost their business.

The fact that a move to SDST will reduce energy use and carbon emissions is enough of an incentive for its adoption.

Why WWF thinks flicking the switch for Earth Hour is worth it | David Nussbaum | Environment | guardian.co.uk

While the UK and the US (two major global emitters) may have seen an increase in sceptical noise on climate change in recent months, I feel confident that globally, this is no waning movement.
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Earth Hour is not about a world without light, power and the great human achievements that keep us warm and safe. It is absolutely a celebration of their positive role; we want a bright future in which the lights stay on, drawing on forms of energy and innovative technologies that have a lesser impact on people and nature around the world.

Earth Hour - climate change campaigners urge global switch-off | Environment | guardian.co.uk

...it will finish on the other side of the international dateline in the Galapagos Islands, where scientists at the Charles Darwin Research Station will share a candle-lit dinner with several hundred locals and environmental activists  [how will these activists get home?].
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Another debutant is a first group of participants from Antarctica: the Davis Research Station, which is home to several dozen scientists who presumably will not be also switching off their heaters in -10 degrees Celsius.
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In cities like Tokyo, Seoul and New York, netizens are being asked to record the switch-off of landmark buildings on their mobile phones and upload them online.
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Not everywhere is going dark. Tanzania initially did not sign up because few would notice a switch off in Dar es Salaam and other cities where only 10% of people have electricity. Instead, WWF organised a "switch on" of solar energy for a local school last year. It will scale this up to 20 schools this year.

In Madagascar, 99% of the country has no electricity and people are frightened to be on the streets after dark because of the instability that has followed the political crisis. But WWF say locals have asked to participate.