![]() Until then, each location in the country observed its own solar time. Australian Time Zone HistoryĪustralia standardized its civil time in 1895. Some locations, including Eucla and Broken Hill, observe time zones that are different from the state they are located in. Time Zones in AustraliaĪustralia has a complex set of time zones, some of which have an unusual UTC offset. The Australian dependencies don't use DST. Time Zones Being Used in Dependencies of Australia Offset It uses Lord Howe Standard Time (LHST) as standard time and Lord Howe Daylight Time (LHST) during DST. Lord Howe Island is a part of New South Wales. It will become active again after the next clock change as Daylight Saving Time begins or ends.ĭaylight Saving Time is used in the Australian Capital Territory, New South Wales, South Australia, Tasmania, and Victoria. The above time zone is used during other parts of the year. Time Zone Not Currently Being Observed in Australia Offset Note: Local time in these time zones changes when Daylight Saving Time begins and ends. For example, Australian Central Time (ACT) refers to both Australian Central Standard Time (ACST) and Australian Central Daylight Time (ACDT), depending on which is currently in use. Time zones in mainland Australia are often referred to by their generic name, without differentiating between standard time and Daylight Saving Time designations. Generalized Time Zones in Australia Time Zone Abbreviation & Name As Western Australia, Queensland, and the Northern Territory don't use Daylight Saving Time (DST), there are only 3 corresponding DST time zones. Adding the country's 3 dependencies (see table below) brings the total to 9 time zones.Īustralia's mainland states and territories are divided into 5 standard time zones. How Many Time Zones Are There in Australia? Time Zones Currently Being Used in Australia Offset Business Date to Date (exclude holidays).Watch: Earth spins through a full year in this time-lapse video.Find out what the time difference is between UTC and your time zone, using this chart from the National Hurricane Center.Army, which divides up the Earth into time zones named after letters of the alphabet, refers to UTC as Zulu time, since it falls in the Z time zone, and Zulu is the code word for that letter in the International Radiotelephony Spelling Alphabet. The acronym came about as a compromise between English and French speakers: Coordinated Universal Time would normally be abbreviated as CUT, and the French name, Temps Universel Coordonné, would be TUC. You might be wondering why UTC is the abbreviation for Coordinated Universal Time. UTC incorporates measurements of the Earth's rotation as well as averaged readings from around 400 atomic clocks around the world, according to the website. In 1967, a committee at the United Nations officially adopted UTC as a standard that's more accurate than GMT for setting clocks. Earthquakes, melting ice sheets and natural oscillations in our planet's motion can cause changes of a few fractions of a second in the amount of time it takes the Earth to spin on its axis, according to NASA. The time standard against which clocks were set then became known as Greenwich Mean Time (GMT).īut by the middle of the 20th century, the new technology of the atomic clock, which can measure time with incredible accuracy, was showing that the Earth's rotation actually varied slightly from day to day. At the conference, 41 delegates from 25 countries chose to set the prime meridian - the zero point for longitude lines - as passing through Greenwich, England, according to. ![]() But there was no universally agreed-upon equivalent for lines of longitude, which run north to south. Lines of latitude, which run east to west around our planet, had always been measured from the equator. In 1884, members met at the International Meridian Conference in Washington, D.C., to discuss a way to synchronize clocks around the globe.
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