Australia · ACST
Sun, 9 Aug 2026
Timezone Guide
Adelaide, Australia runs on UTC+9:30. Clocks move forward each spring and back each autumn: UTC+9:30 in winter, UTC+10:30 in summer. Next change: 3 Oct. There is a 13.5-hour difference between Adelaide and New York. Standard working hours don't overlap at all with New York, so meetings need an early or late slot on one side. There is a 8.5-hour difference between Adelaide and London. Standard 9-to-6 working hours overlap for about 0.5 hours a day with London. A good time to connect: 17:30–18:00 in Adelaide lines up with 09:00–09:30 in London. There is a 0.5-hour difference between Adelaide and Tokyo. Standard 9-to-6 working hours overlap for about 8.5 hours a day with Tokyo. A good time to connect: 09:30–18:00 in Adelaide lines up with 09:00–17:30 in Tokyo. This timezone is also shared with cities such as Darwin. Keeping these offsets in mind makes it easier to schedule calls or travel to and from Adelaide.
Practical Info
Adelaide (Australia) is home to roughly 1.4M people. Today brings about 9.8 hours of daylight: sunrise at 07:24, sunset at 17:12. Clocks move forward each spring and back each autumn: UTC+9:30 in winter, UTC+10:30 in summer. Next change: 3 Oct. It sits in the Southern Hemisphere, about 35° south of the equator. Traffic drives on the left.
Flag
Australia
Capital
Canberra
Continent
Oceania
Time Zone
ACST · Australia/Adelaide
Coordinates
34.93°S, 138.60°E
Currency
AUD ($)
Calling Code
+61
Driving Side
Left
Hemisphere
Southern
Language
English
Measurement System
Metric
Did You Know?
South Australia grows roughly half of all Australian wine — some counts put the state's share of the national crush at 55% — and about 80% of the country's premium output. It has over 680 wineries across 18 official wine regions and around 74,521 hectares of vines, more than double New South Wales.
But the interesting number is a date.
In the Barossa Valley, at Langmeil, there are Shiraz vines planted in 1843 that are still producing fruit.
They should not exist. In the late nineteenth century phylloxera, an aphid that attacks vine roots, destroyed the vineyards of North America, then Europe, then eastern Australia. Almost every vine in France, Italy and Spain today is grafted onto resistant American rootstock, because the originals are gone.
South Australia was spared. Isolation helped, and then quarantine restrictions were imposed and enforced, and the Barossa remains phylloxera-free to this day. The result is that some of the oldest continuously producing vineyards on Earth are not in Bordeaux or Burgundy but a ninety-minute drive from Adelaide.
The first vine in the state was planted in 1836, in North Adelaide. Dr Christopher Rawson Penfold arrived at Magill Estate in 1844 with cuttings he had carried from France. German Lutheran settlers fleeing persecution in Prussia built the Barossa from the 1840s.
The clock: South Australia is half a step out from its neighbours in another way too.
Adelaide runs on UTC+9:30, one of the world's half-hour zones, sitting between Western Australia on UTC+8 and the eastern states on UTC+10. Rather than round to either, the state split the difference. In summer it goes to UTC+10:30, staying exactly half an hour offset from Sydney and Melbourne all year round.
A state that stayed half an hour apart from its neighbours on the clock, and stayed apart from the rest of the wine world by keeping an insect out.
Both kinds of separation turned out to be worth having.
Annual Daylight
Working Hours