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Is Australia one day ahead of the US (Eastern Time Zone)? 9 facts

Is Australia one day ahead of the US (Eastern Time Zone)? 9 facts

Is Australia one day ahead of the United States (Eastern Time Zone)?

Q. Is Australia one day ahead of the United States (Eastern Time Zone)?

I’m in Australia, but I just Googled it. Wondering why you didn’t do the same.

It is now 2.30 am on Tuesday in Melbourne and 12.30 pm on Monday in New York.

We are 14 hours ahead of New York, 16 hours ahead of Denver, 17 hours ahead of LA, and 20 hours ahead of Honolulu.

Is Australia one day ahead of the United States (Eastern Time Zone)?

If you are on the west coast of the USA, you are 18 hours behind Australia. So, if you are on the east coast of the USA, you are 15 or 16 hours behind the east coast of Australia.

So, if it’s 7 am Monday in New York City, it would be approx. 10 pm on Monday here in Sydney, on the east coast of Oz. If it’s daylight savings time in Oz, which begins in early October, you must add one more hour for the Aussie time.

When you fly to Australia, you go across the International Date Line and gain time. If you are flying from Oz to the USA, you lose time.

Hope this helps you out and that I have not confused you.

Is Australia one day ahead of the United States (Eastern Time Zone)?

Eastern time zone in the US right now is 5:05 pm Thursday

Right now, the Eastern time zone in Australia is 8:05 am Friday for standard time states and 9:05 am Friday for daylight savings time states.

So that would make eastern Australia 15–16 (state-dependent) hours ahead of eastern USA.

Is Australia one day ahead of the United States (Eastern Time Zone)?


Mainland Australia is almost the same size as mainland USA, so how far behind the USA is, according to the clocks, depends on where in Australia you are and where you are in the USA. Both countries have multiple time zones.

The question specifies USA Eastern Standard Time, about 14 hours behind Australian Standard Eastern Time. However, taking Australia’s Western time zone, EST USA is around 12 hours behind.

Right now, it is 10:53 pm on Sunday in New York. Here in Sydney, it is 12:57 pm on Monday, but in Perth, Australia’s far west coast, it is 10.54 am on Monday.

I once did a lot of work here in Sydney for a tech in Plano, Texas. Depending on daylight saving here in Oz or Texas (they overlap for a time), 3 pm here in Sydney is roughly midnight in Plano. So, it was easier for me to remember Plano is nine hours ahead the day before rather than 15 hours behind Eastern Standard Time in Australia. Plano was my benchmark, and I’d subtract 2 hours to get a rough estimate of the time in SF or add 2 for NY.

Is Australia one day ahead of the United States (Eastern Time Zone)?

US EST is 5 hours behind Greenwich, with Australian Eastern Standard Time 10 hours ahead of Greenwich. This means Sydney is 15 Hours ahead of New York.

For these calculations, working exclusively on 24 Hour clock is the best way.

3.00 pm in New York = 1500 Hours

+15 hours =30 hundred Hours, as you can’t have 30 Hundred Hours. You take 24 Hours

30 -24 = 6, therefore, in Sydney. 06 Hundred Hours; however, the 24 Hours have added 1 day; therefore, Sydney is 1 day ahead, but if we are talking about any time earlier than 9 am, Sydney is still 15 hours ahead, but as the total is less than 24 hundred hours, it is still the same day

8 am in New York 0800 + 1500 = 2300 Hrs; therefore time in Australian Eastern Standard Time is 11 pm

Take care standard times can be impacted by D’ath light Saving Tome. Sydney, Melbourne and Hobart are currently on Daylight Saving Time, 11 Hours ahead of Greenwich

. Therefore, New York is 16 Hours behind Sydney but still 15 hours behind Brisban. It is 1530 in Brisbane, New Y, which is currently 0030 or 12:30 am on 20 October. An hour ago, at 11:30 pm on 19 October,

Why does Australia have such crazy time zones?

History and geography.

Let’s start with the basics: Queensland, NSW, ACT, Victoria, and Tasmania are customarily in one time zone. SA and NT are in a second. WA is in a third. External territories have their time zones. That makes logical sense when you look at the size of the country (the US has four time zones, Russia has 546 or so, and China solves the problem of being big by requiring everyone to behave as if they’re in Beijing).

Now we get a bit more interesting. NSW, ACT, Victoria, and Tasmania observe daylight saving, while Queensland doesn’t. There’s a long historical explanation for why Queensland doesn’t, but the main reason is that the state is quite large north-to-south, and the tropical parts don’t see the fluctuations in daylight hours that Sydney (or Hobart, more extremely) gets. Of course, considering where Brisbane is relative to the border, there’s an argument in favor of two time zones for the state, but that’s a bit ugly.

South Australia is further south than the Northern Territory, and most of the population there is considerably so, living around the coast. Hence, it makes more sense for SA to observe daylight saving than it does for the more tropical parts of the Northern Territory to do so.

Western Australia doesn’t do daylight saving.

Then you have the two quirks of local time zones, which is where history comes into play:

Broken Hill follows South Australian time. This is despite it being in New South Wales. Why? Well, it’s a long way from Sydney, for one thing. Additionally, when time zones were standardized, it was linked to Adelaide, not Sydney, so it made more sense.

A tiny area around the WA and SA border (around Eucla) has an unofficial time zone since that area far east of Perth is practically its time zone anyway. This area’s population is around 200 people, so it’s not something that turns up in everyday experience.

Is Australia one day ahead of the United States (Eastern Time Zone)?

Look at a map of the world, and you can tell the rest of the world how backward you are time-wise to Sydney, Australia.

How many time zones are there in Australia? Why do they vary so much from state to state?

It depends on the time of year. In Winter, we have three time zones

  1. Australian Eastern Standard Time (ACT, NSW, Qld, Tas, Vic) GMT +10 hours
  2. Australian Central Standard Time (SA & NT) GMT +9.5 Hours
  3. Australian Western Standard Time (WA) GMT +8 Hours.

However, in Summer, we have five

  1. Australian Eastern Summer Time (ACT, NSW, Tas, Vic) GMT +11 hours
  2. Australian Central Summertime (SA) GMT +10.5 Hours
  3. Australian Eastern Standard Time (Qld) GMT +10 hours
  4. Australian Central Standard Time (NT) GMT +9.5 Hours
  5. Australian Western Standard Time (WA) GMT +8 Hours.

This is because individual states and territories decide on daylight saving, and getting Australian states and territories to agree on most things is like herding cats. Hell, we’ve been a sovereign nation for nearly 122 years and haven’t even been able to agree on a standard rail gauge as yet!

The need for the differing time zones is straightforward; we’re a similar size to the USA, which also has multiple time zones. They’re both large countries. That simple.

Is Australia one day ahead of the United States (Eastern Time Zone)?

Australia is generally one day ahead of the United States (Eastern Time Zone). The time difference is due to the Earth’s rotation, which causes different parts of the world to experience different days and times simultaneously. Australia is ahead of the United States because it is located east of the International Date Line, which marks the transition between different calendar days. This means a particular day in Australia is typically still the previous day in the United States Eastern Time Zone. However, it’s important to note that there can be variations, particularly for places observing daylight saving time, which may temporarily affect the time difference.

Is Australia one day ahead of the United States (Eastern Time Zone)?

The answer would be yes. Mostly.

Depending on which part of Australia you’re referencing. Australia comprises three time zones, ranging from 8 to 10 hours ahead of UTC. The US Eastern time zone is 5 or 4 hours behind UTC.

That would make the date/time in Australia anywhere from 12 to 15 hours later than U.S. Eastern time. So, for example, if it’s 1:00 AM in NY, it would be sometime between 1:00 PM and 4:00 PM in Australia, the same day, depending on the exact location. However, if it’s 3:00 PM in NY, in Australia (again, depending on the exact location), it would be sometime between 3:00 AM and 6:00 AM the next day.

As I don’t know if (or how) DST is observed in Australia, the above does not consider those possible hour adjustments.

How many time zones does Australia have?

Australia is quite a large country. We’re pretty close to the same size as the 48 grouped states of the USA.

Our 3 time zones correspond with the location of our 3 central longitudinal locations: Eastern Australia at GMT +10 hours (4 states and 1 territory), Central Australia at GMT +9.5 hours (1 state and 1 territory), and Western Australia (with 1 state of the same name) at GMT +8 hours.

We have more time zones in Summer (5 in total) due to Daylight Savings, as not all states and territories participate.

Why does the United States have four time zones?

The US comprises six time zones (only counting states, not territories).

The reason the US is divided into so many time zones is the same reason we have time zones in general, and that is the sun rises and sets at different times. It would be odd to pretend that New York and Hawaii should follow the same standardized time. Today, the sun rose at 5:36 am in New York City. Honolulu recorded their sunrise at 5:52 am. If Honolulu followed NYC, the sun wouldn’t rise until 10:52. That’s just over an hour from noon, generally considered when the sun is at its highest point in the sky.

How do Australian time zones work?

There are several Australian time zones.

The official ones are

  • Eastern Standard Time (Queensland, New South Wales, Victoria, Tasmania – +10 UMT).
  • Central Time (Northern Territory, South Australia- +9:30 UMT).
  • Western Standard Time (Western Australia- + 8 UMT).

Queensland, Northern Territory and Western Australia do NOT observe Daylight Saving.

Additionally, there is an informal time zone when traveling the Eyre Highway, which is 45 minutes different. It is from the border to Caiguna and is referred to as CWST.

In winter, time zones are straightforward; however, in summer, they are not.

Since Australia and the United States are approximately the same distance from the West Coast to the East Coast, why does Australia only have three time zones while the United States has more?

The demographics of Australia are very different from those of the USA. Nearly all the population is in the east, within an hour’s solar time of each other. For them, it makes sense to have a single time zone offset, though, for legislative reasons, each state (Queensland, New South Wales, Victoria and Tasmania) has its time zone, which is mainly in sync with each other. Still, there have been differences in DST. In winter, all of the states have an offset UTC+10.

Then there’s Perth in WA, roughly 2½ hours difference in solar time from Brisbane. So, the WA government chose its time zone, offset UTC+8.

That leaves only South Australia and the Northern Territory, each with its time zone. From a geographical viewpoint, they should have an offset of UTC+9, but the SA government decided on UTC+9:30 to be closer to the eastern states, and NT did the same.

Did I say “only”? No, there’s also the Central Western Time Zone in the south-east of WA, with a population of about 200, with an offset of UTC+8:45. Here is the Nullarbor highway heading east:

There are also a couple of other particular time zones like Broken Hill (in NSW, but uses SA offsets) and a couple of islands. Lord Howe Island has an offset of UTC+10:30 in winter and UTC+11 in summer.

In summary, Australia has no fewer than 12 entries in the time zone database: Adelaide, Brisbane, Broken_Hill, Currie, Darwin, Eucla, Hobart, Lindeman, Lord_Howe, Melbourne, Perth, Sydney, and there are at least 5 distinct offsets (8 if you count DST).

EDIT: Tim Foster comments that the continental USA is wider than continental Australia. That’s correct, though the angular difference counts, not the linear distance (about 40° or 2 hours, 40 minutes for Australia, 57° or 3 hours, 48 minutes for the USA). But that’s only part of the story: these places also need to be inhabited to be interesting. The naked distances could be an argument for up to 4 one-hour time zone offsets in Australia and 5 in the USA.

How many time zones are there in Australia? Why does Australia have fewer time zones than other countries?

Australia has three time zones in winter and four in summer. That’s less than the USA and Russia but much more than the UK, France, and Norway. How many? It depends on how many degrees of longitude the country spans and how strongly governments can enforce time zones across more significant deviations from the local ’natural’ time (for example, India and China each have a strong central government and a single time zone)

The Australian time zones align with the state boundaries, and the central Australian time zone is close to being centered on its largest population center, Adelaide. So, unusually, it is half an hour different from the eastern zone. The eastern zone covers all of the large population centers in the eastern states – and by the political choice of Queensland, the northernmost of those states, it is the only one of these to stay out of daylight saving shift in summer and therefore makes a fourth-time zone- justifiably so, as it is closer to the tropics and further east relative to the time zone, it would get little of the advantage of daylight saving that is evident in the southern states, with their big cities also positioned further west. Australia’s population is very much concentrated in the states’ capital cities, and they have dominated the political decisions around time zones and daylight saving for the whole of their states. The borders of states are thinly inhabited, so time zone differences affect few local communities: only the inland city of Mt Isa, which works in a cross-border time zone by choice and the nearly contiguous communities of Tweed Heads (NSW) and Coolangatta (Queensland) on the Gold Coast which deals with a one hour time difference during the months of daylight saving in NSW and the other southern states.

Why does Australia have so many time zones?

The simple answer is that Australia occupies a large chunk of land – the continental US has four time zones, for much the same reason.

That doesn’t really explain it all, so let’s get a bit more granular.

Logically enough, the eastern seaboard has one-time zone, the central states (well, South Australia and the Northern Territory, the latter of which isn’t a state) have another, and Western Australia has a third. That’s not surprising, given the size of each of these three divisions of the continent.

Then we look at daylight saving. On the eastern seaboard, everywhere apart from Queensland observes daylight saving. Why doesn’t Queensland do it as well? Well, there are many reasons (some are weird, some are logical), but many of them come down to the fact that the northern parts of the state are in the tropics, while the southern parts border New South Wales. Daylight saving means a lot more when you’re further from the equator, so requiring people in (say) Cairns to observe it isn’t quite as useful as having people observing it in Melbourne. Therefore, during October-March, the eastern seaboard has two time zones.

Moving to the country’s center, the Northern Territory doesn’t observe daylight saving, while South Australia does. This is again to do with the north-south distances involved. The Territory’s central population hub is Darwin, which is in the tropics, with Alice Springs as a secondary city. Adelaide, on the other hand, is a long way south, and therefore, South Australians tend to derive more benefit from observing daylight saving than their neighbors to the north do. Again, this results in two time zones in the country’s center during summer.

Western Australia doesn’t do daylight saving. Given the location of Perth, I’m a bit unclear why it doesn’t, but that may be because it’s just a vast state overall.

So far, it’s relatively simple. You then have two slightly unusual time zones:

  • Broken Hill in western New South Wales runs on South Australian time. This is because the city was connected to the South Australian train system before it was connected to the NSW one. Since time zones often link up (historically) with train transport, that’s where that comes from.
  • There’s also the town of Eucla in the far east of Western Australia, and the region around it (which spills into far western South Australia). There’s a local time zone there of UTC+8:45, as opposed to Adelaide’s +9.5 or Perth’s +8. This is because that area is a long way from Adelaide or Perth, and things like sunrise occur at appreciably different times to those in Adelaide or Perth. That district has population of around 200, so it’s not a significant issue.

Do all states in Australia have their own time zone? If so, why?


Some states lie on a north-south line — e.g., Queensland, New South Wales, Victoria, and Tasmania (and the Australian Capital Territory). In winter, they are all in the same time zone (AEST — 10 hours ahead of Greenwich). In summer, Queensland remains in AEST while the other states and territories along that north-south line go into daylight saving time (AEDT — 11 hours ahead of Greenwich).

The Australian Central Standard Time (9.5 hours ahead of Greenwich) covers the Northern Territory and South Australia. In summer, South Australia goes into daylight saving time (ACDT — 10.5 hours ahead of Greenwich).

The Australian Western Standard Time (8 hours ahead of Greenwich) covers Western Australia. So WA is the only state to have its very own time zone; all the others share the time zone with other states or territories.

How many time zones does Australia have? How does this compare to the United States?

I could answer 3, but it’s not quite that simple.

Australia has a land mass of almost 7.7 million square kilometers and is the world’s sixth-largest country. Many prominent countries have more time zones, but we start with THREE.

Australian Eastern Standard Time (AEST)

Australian Central Standard Time (ACST),

Australian Western Standard Time (AWST)

and there are some little extras for;

Norfolk Island Standard Time to the east, Christmas Island Time to the west, and Cocos (Keeling) Islands Standard Time.

Whatever Time Zone the use in the Australian Antarctic Territory, Antarctica

Plus, a fiddly bit at the bottom of South Australia crosses into other time zones.

These are all changes in summer for Daylight Saving Time (DT), but not for all states.

Time zones include state or territory, capital cities, es and summer or DT.

Australian Eastern Standard Time (AEST) Queensland – Brisbane

Australian Eastern Daylight Time (AEDT) New South Wales, (except Broken Hill), Victoria, Tasmania, Australian Capital Territory – Sydney, Melbourne, Hobart, Canberra

Australian Central Daylight Time (ACDT) South Australia – Adelaide, Broken Hill (western NSW)

Australian Central Standard Time (ACST) Northern Territory – Darwin

Australian Western Standard Time (AWST) Western Australia – Perth

Norfolk Island Daylight Time (NFDT) Norfolk Island – Kingston

Christmas Island Standard Time (CXT) Christmas Island

Cocos (Keeling) Islands Standard Time (CCT) Cocos (Keeling) Islands


Australian Central Western Standard Time (ACWST) is set halfway between the official Western and Central times. With Western Time at UTC+8:00 and Central Time at UTC+9:30, splitting the difference makes the so-called Central Western Time UTC+8:45. A time zone that’s based not on the hour or the half-hour, but on the quarter hour!

ACWST is observed in a tiny strip of land in the far southeastern corner of Western Australia, in five tiny towns along the Eyre Highway, extending from just outside of Caiguna to Border Village, about 50 meters across the state line into South Australia, for a total length of about 340 kilometers.

The northern boundary is less precise, but time doesn’t matter on the Nullarbor Plain, a vast, dry, flat expanse of empty acreage north of the Eyre Highway. See the circle on the map below.

Places that follow ACWST include:

  • Cocklebiddy, with its world-class cave systems
  • Madura and its panoramic views from the Hampton Tablelands
  • Mundrabilla, where pioneers first settled on the Nullarbor in 1872
  • Eucla, with its old telegraph station ruins and …. a golf course!
  • Border Village, which as the name implies, sits just across the border and has the distinction of being the only spot in South Australia to follow ACWST

Only a few hundred people lived within the narrow ACWST strip, making agreeing upon a standard time easier. They set their clocks as they please. The authorities looked the other way, and ACWST continued without official sanction.

And it makes a lot of sense. The hour-and-a-half gap at the border between Western and Central time is enough. Still, it gets worse in summer when South Australia switches to Daylight Saving Time, but Western Australia does not and the gap becomes an incredible two and a half hours just by crossing from one state to another.

Problem solved at the local level.

Information on ACWST came from the Howder Family blog / weird little time zone.

Why does Australia have a time difference?

Why does Australia have different time zones within one country? Well, Australia is big. It is 4000 km from the East Coast to the West Coast.

The sun rises in the East and sets in the West as the Earth rotates on its axis (roughly every 24 hours), and we journey around the sun in orbit (roughly every 365 days).

Because Australia is so broad (wide), when the sun comes over the horizon in the East (for example, Sydney), it is still dark in the West (Perth) for several hours due to the curvature of the planet.

So to have a single time zone, in summer – with the longest days, Perth would be getting up in the dark at 7 AM and going to bed while it was just dark at about 9 PM. Itt makes sense to adjust the times to suit the realities of nature.

The fact that we have three time zones is more about politics – and not having a state split between two times within its borders. Some places happily tolerate that – for example (check the world time zone map), China is massive but retains a single time zone. Conversely, the United States of America is approximately the same width as Australia but split into 4 time zones.

The permanent time zones in Australia are further complicated by “daylight savings” (summer time) when clocks are put forward by an hour in the southeastern states. But because Australia is also significant – 3860 km – from North to South, there is a difference between sunrise and sunset times from North (near the equator) to South. Hence, Queensland does not use daylight savings even though the Southern states do.

Is Australia one day ahead of the United States (Eastern Time Zone)?

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