Perth to EDT
-12hPerth
AWSTSOURCEEDT
EDTGreen rows indicate typical business hours (9 AM - 5 PM)
AWST and EDT on the World Map
The map below highlights the AWST (Australian Western Standard Time) and EDT (Eastern Daylight Time) timezone regions across the globe.
AWST – Australian Western Standard Time
UTC+08:00Australian Western Standard Time (AWST) is the time zone for Western Australia, 8 hours ahead of UTC.
- •Western Australia does not observe daylight saving time.
- •Perth is the most isolated major city in the world.
- •AWST is the same offset as China Standard Time and Singapore Time.
EDT – Eastern Daylight Time
UTC-04:00Eastern Daylight Time (EDT) is the daylight saving time observed in the Eastern Time Zone, 4 hours behind UTC.
- •EDT is observed from the second Sunday of March to the first Sunday of November.
- •During EDT, the US East Coast is only 4 hours behind London (instead of 5).
- •Not all EST locations switch to EDT – Panama and Jamaica stay on EST year-round.
About Perth
WikipediaPerth operates on Australian Western Time (AWST), UTC+8 with no daylight saving. As Australia's mining capital, Perth coordinates with Asian markets.
Western Australia does not observe daylight saving time.
Perth vs EDT: Offsets, DST and Best Call Times
Perth runs on Australian Western Standard Time (AWST) at UTC+08:00. EDT runs on Eastern Daylight Time (EDT) at UTC-04:00. That puts Perth 12 hours behind EDT — a difference of -12h at the current offsets.
In practice, when it is 9:00 AM in Perth it is 9:00 PM in EDT on the previous day. Midnight in Perth is 12:00 PM in EDT. Neither zone observes daylight saving time, so the offset between them stays constant all year.
Perth to EDT time conversion table
| Perth (AWST) | EDT (EDT) | Day |
|---|---|---|
| 12:00 AM | 12:00 PM | previous day |
| 6:00 AM | 6:00 PM | previous day |
| 7:00 AM | 7:00 PM | previous day |
| 8:00 AM | 8:00 PM | previous day |
| 9:00 AM | 9:00 PM | previous day |
| 12:00 PM | 12:00 AM | same day |
| 3:00 PM | 3:00 AM | same day |
| 5:00 PM | 5:00 AM | same day |
| 6:00 PM | 6:00 AM | same day |
| 9:00 PM | 9:00 AM | same day |
Why people convert Perth to EDT time
- Scheduling a call from Perth to EDT: a 10:00 AM start in Perth lands at 10:00 PM in EDT the previous day, so you can confirm the slot without doing the arithmetic yourself.
- Handling a -12h gap: Perth and EDT have no overlap inside a normal 9-to-5 day, so real-time meetings need an early-morning or late-evening slot on one side. 9:00 AM in EDT is 9:00 PM in Perth.
- Booking travel or deliveries: tracking EDT local time against Perth keeps pickup windows and arrival estimates honest across the -12h offset.
- Always state the zone abbreviation, not just the hour. "3:00 PM AWST" is unambiguous; "3 PM" across a -12h gap is not.
- With a -12h gap there is no shared 9-to-5 window, so alternate the early start: one week Perth takes the early slot, the next week EDT does.
About AWST (Australian Western Standard Time)
Australian Western Standard Time (AWST) is used in Western Australia. WA does not observe daylight saving time, having rejected it in multiple referendums. Perth is the most remote major city in the world.
About EDT (Eastern Daylight Time)
Eastern Daylight Time (EDT) is used during the summer months (second Sunday of March to the first Sunday of November) in the Eastern Time Zone. During EDT, clocks are advanced by one hour to take advantage of longer daylight hours. Not all locations in the Eastern Time Zone observe DST – Panama, Jamaica, and most of the Caribbean remain on EST year-round.
Best time to call between Perth and EDT
With a -12h offset there is no overlap inside a normal 9 AM – 5 PM day. EDT opens at 9:00 AM EDT, which is 9:00 PM in Perth, so real-time calls need an early-morning or late-evening slot on one side.
Business hours overlap
Perth and EDT have no shared working hours because of the -12h gap. Teams need to alternate early starts or rely on asynchronous handovers.
Perth is 12 hours behind EDT (AWST UTC+08:00 → EDT UTC-04:00). There is no shared 9-to-5 window, so plan around an early or late slot. Remember to re-check around daylight-saving transitions.
🕐 Daylight Saving Time Info
Perth
Does not observe DST
EDT
☀ Currently in DST
Standard: UTC-05:00 · DST: UTC-04:00
Clocks fall back on Sun, Nov 1, 2026
Learn More About Time
Dive deeper into the fascinating world of timekeeping, time zones, and how they shape our global society:
Frequently Asked Questions
What is the time difference between Perth and EDT?
Perth (AWST, UTC+08:00) is 12 hours behind EDT (EDT, UTC-04:00). The gap is currently -12h.
How do I convert Perth time to EDT time?
Add -12h to Perth local time. For example, 9:00 AM in Perth is 9:00 PM in EDT (previous day).
What time is it in EDT right now?
EDT uses EDT at UTC-04:00. Use the live converter at the top of this page — it updates in real time and already accounts for the -12h offset from Perth.
What is the best time to call EDT from Perth?
There is no shared working-hours window because of the -12h gap. The closest option is 1:00 PM in Perth, which is 1:00 AM in EDT.
Which is behind, Perth or EDT?
Perth is 12 hours behind EDT. When it is 12:00 PM in Perth it is 12:00 AM in EDT.
Do Perth and EDT use different time zones?
Perth (Australia) uses AWST at UTC+08:00, while EDT uses EDT at UTC-04:00. The IANA identifiers are Australia/Perth and America/New_York.
Does daylight saving time affect the Perth–EDT difference?
Neither zone observes daylight saving time, so the -12h offset between Perth and EDT is fixed all year.
Which other cities share Perth's time zone?
AWST also covers Perth, Mandurah, Bunbury, Geraldton.
Which countries use AWST, Perth's zone?
AWST is used in Australia (Western Australia).
Is there a day difference between Perth and EDT?
Sometimes. The -12h gap is large enough that 8:00 PM or later in Perth already falls on the in EDT.
What is the time difference between Perth and EDT?
EDT is -12h from Perth.
What timezone is Perth in?
Perth operates on Australian Western Time (AWST), UTC+8 with no daylight saving. As Australia's mining capital, Perth coordinates with Asian markets.
What timezone is EDT in?
EDT operates on its local timezone.
What are the business hours in Perth?
Standard business hours in Perth are 9:00 AM - 5:00 PM AWST.
Which countries use AWST (Australian Western Standard Time)?
AWST is used in Australia (Western Australia).
Does AWST observe daylight saving time?
No, AWST does not observe daylight saving time and remains at UTC+08:00 year-round.
What are some interesting facts about AWST?
Western Australia does not observe daylight saving time. Perth is the most isolated major city in the world.
Which cities are in the EDT timezone?
Major cities in the EDT timezone include New York City, Washington D.C., Toronto, Miami, Philadelphia, Atlanta, Boston, Montreal.
What is the UTC offset for EDT?
Eastern Daylight Time (EDT) is at UTC-04:00. During daylight saving time, it shifts to EST.
What should I know about the EDT timezone?
EDT is observed from the second Sunday of March to the first Sunday of November. During EDT, the US East Coast is only 4 hours behind London (instead of 5).
When is it midnight in Perth, what time is it in EDT?
When it is 12:00 AM (midnight) in Perth (AWST), it is -12h later in EDT (EDT).
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