Beginning in 2007, daylight time will begin earlier and end later in the United States and in most jurisdictions in Canada. U.S. President George W. Bush signed legislation in August 2005 calling for daylight time to start on the second Sunday in March, three weeks earlier than the traditional start. The bill also extends daylight time by a week to the first Sunday in November. This new schedule was introduced to try to help save energy, since people aren't expected to need their lights on as early in the evening. But there is still some debate about how effective the change will be at reducing energy consumption.
Most Canadian provinces and territories say they will follow the U.S. plan and begin daylight time earlier and end it later. Ontario has said not doing so would create too many headaches for trade and travel. Nunavut, with the exception of Southampton Island, which does not observe daylight time, will continue to change its clocks in April and October unless the territory changes its laws. Most of Saskatchewan has not observed daylight time since 1966 and stays on Central Standard Time all year round. Some border towns follow the time schemes of their neighbours in Manitoba or Alberta. In Canada, areas of Quebec east of 63 degrees west longitude do not change to daylight time and remain on Atlantic Standard Time year round. Pockets of Ontario and British Columbia do not use daylight time.
Daylight time is observed in most of the United States, with the exceptions of part of Arizona and part of Indiana. Much of Africa does not observe it, nor does China, Japan, the Indian subcontinent or Indonesia.
Some parts of Australia have adopted daylight time. Of course, it's done a little differently than in the Northern Hemisphere where seasons are opposite. So, when daylight time starts in Canada, it comes to an end in Australia and vice versa. When Canadians are waxing their skis in December, Australians are waxing their surfboards because it's summer there.