Daylight saving ends: clocks fall back across Australia

Millions of Australians are set to claim an extra hour of sleep this weekend as daylight saving comes to an end across much of the country.

The clock change, which occurs on the first Sunday of April each year, means residents in New South Wales, Victoria, the Australian Capital Territory, Tasmania and South Australia will wind their clocks back one hour at 3am, returning to 2am.

Queensland, the Northern Territory and Western Australia observe no daylight saving, meaning their residents will see no change in their clock times.

The end of daylight saving also simplifies Australia's notoriously complex time zones. When clocks shift back, the country's five winter time zones consolidate to just three—AEST, ACST and AWST—bringing NSW, Victoria, ACT, Tasmania and Queensland onto the same Australian Eastern Standard Time.

The system won't return until October 1, when clocks will spring forward again.

Daylight saving remains one of the more contentious practices in modern timekeeping. The concept dates to the late 1800s when a New Zealand insect expert, George Vernon Hudson, first proposed the idea in 1895 to make better use of natural light across the year. The notion was that shifting waking hours to align with evening daylight—rather than sleeping through dawn—could benefit society.

The first jurisdiction to actually implement the practice was the Canadian city of Port Arthur in 1908, after a local businessman convinced council to push clocks forward so children could enjoy an extra hour of sunlight in summer. Germany and Austria followed during World War I to conserve artificial lighting fuel.

Australia's relationship with daylight saving has been equally contentious. Tasmania became the first Australian state to reintroduce it in 1967 during a drought, with the logic that extra evening light would encourage people to turn on lights later and conserve hydroelectric power. Most other states adopted the practice in 1971, though Western Australia abandoned it after a three-year trial in 2006, and Queensland—which tried it in the early 1970s—ditched the system just as quickly.

The practice remains divisive. Proponents argue it makes better use of natural light and can reduce energy consumption. Critics, particularly in states that don't observe it, contend that the disruption to sleep patterns and business operations outweighs any benefit.

The debate isn't uniquely Australian. Daylight saving is observed by approximately 40 per cent of the world's population across more than 70 countries. New Zealand ends daylight saving on the same weekend, while much of Europe, the UK, the US and Canada pushed their clocks forward in March, moving in the opposite direction.

For most Australians heading into autumn, the change means one thing: a chance to sleep in by an extra hour when clocks fall back this coming Sunday.