Perth to PDT
-15hPerth
AWSTSOURCEPDT
PDTGreen rows indicate typical business hours (9 AM - 5 PM)
AWST and PDT on the World Map
The map below highlights the AWST (Australian Western Standard Time) and PDT (Pacific 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.
PDT – Pacific Daylight Time
UTC-07:00Pacific Daylight Time (PDT) is the daylight saving offset on the US/Canada Pacific coast, 7 hours behind UTC.
- •PDT aligns with MST at UTC-07:00.
- •Tech company earnings calls often reference PDT/PST times.
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.
Comparing Time Zones: Perth and PDT
Perth runs on Australian Western Standard Time (AWST) at UTC+08:00. PDT runs on Pacific Daylight Time (PDT) at UTC-07:00. That puts Perth 15 hours behind PDT — a difference of -15h at the current offsets.
In practice, when it is 9:00 AM in Perth it is 6:00 PM in PDT on the previous day. Midnight in Perth is 9:00 AM in PDT. Neither zone observes daylight saving time, so the offset between them stays constant all year.
Perth to PDT time conversion table
| Perth (AWST) | PDT (PDT) | Day |
|---|---|---|
| 12:00 AM | 9:00 AM | previous day |
| 6:00 AM | 3:00 PM | previous day |
| 7:00 AM | 4:00 PM | previous day |
| 8:00 AM | 5:00 PM | previous day |
| 9:00 AM | 6:00 PM | previous day |
| 12:00 PM | 9:00 PM | previous day |
| 3:00 PM | 12:00 AM | same day |
| 5:00 PM | 2:00 AM | same day |
| 6:00 PM | 3:00 AM | same day |
| 9:00 PM | 6:00 AM | same day |
Why people convert Perth to PDT time
- Scheduling a call from Perth to PDT: a 10:00 AM start in Perth lands at 7:00 PM in PDT the previous day, so you can confirm the slot without doing the arithmetic yourself.
- Handling a -15h gap: Perth and PDT 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 PDT is 6:00 PM in Perth.
- Watching a live event or market open: Perth viewers need 6:00 PM in PDT to catch a 9:00 AM start there, and 3:00 PM if the event is anchored to Perth.
- Always state the zone abbreviation, not just the hour. "3:00 PM AWST" is unambiguous; "3 PM" across a -15h gap is not.
- With a -15h gap there is no shared 9-to-5 window, so alternate the early start: one week Perth takes the early slot, the next week PDT 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 PDT (Pacific Daylight Time)
Pacific Daylight Time (PDT) is observed from March to November on the Pacific coast. During PDT, the west coast is 7 hours behind UTC and only 2 hours behind the east coast's EDT.
Best time to call between Perth and PDT
With a -15h offset there is no overlap inside a normal 9 AM – 5 PM day. PDT opens at 9:00 AM PDT, which is 6:00 PM in Perth, so real-time calls need an early-morning or late-evening slot on one side.
Business hours overlap
Perth and PDT have no shared working hours because of the -15h gap. Teams need to alternate early starts or rely on asynchronous handovers.
Perth is 15 hours behind PDT (AWST UTC+08:00 → PDT UTC-07:00). 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
PDT
☀ Currently in DST
Standard: UTC-08:00 · DST: UTC-07:00
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 PDT?
Perth (AWST, UTC+08:00) is 15 hours behind PDT (PDT, UTC-07:00). The gap is currently -15h.
How do I convert Perth time to PDT time?
Add -15h to Perth local time. For example, 9:00 AM in Perth is 6:00 PM in PDT (previous day).
What time is it in PDT right now?
PDT uses PDT at UTC-07:00. Use the live converter at the top of this page — it updates in real time and already accounts for the -15h offset from Perth.
What is the best time to call PDT from Perth?
There is no shared working-hours window because of the -15h gap. The closest option is 1:00 PM in Perth, which is 10:00 PM in PDT.
Which is behind, Perth or PDT?
Perth is 15 hours behind PDT. When it is 12:00 PM in Perth it is 9:00 PM in PDT.
Do Perth and PDT use different time zones?
Perth (Australia) uses AWST at UTC+08:00, while PDT uses PDT at UTC-07:00. The IANA identifiers are Australia/Perth and America/Los_Angeles.
Does daylight saving time affect the Perth–PDT difference?
Neither zone observes daylight saving time, so the -15h offset between Perth and PDT 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 PDT?
Sometimes. The -15h gap is large enough that 8:00 PM or later in Perth already falls on the in PDT.
What is the time difference between Perth and PDT?
PDT is -15h 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 PDT in?
PDT 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 PDT timezone?
Major cities in the PDT timezone include Los Angeles, San Francisco, Seattle, Vancouver, Portland.
What is the UTC offset for PDT?
Pacific Daylight Time (PDT) is at UTC-07:00. During daylight saving time, it shifts to PST.
What should I know about the PDT timezone?
PDT aligns with MST at UTC-07:00. Tech company earnings calls often reference PDT/PST times.
When is it midnight in Perth, what time is it in PDT?
When it is 12:00 AM (midnight) in Perth (AWST), it is -15h later in PDT (PDT).
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