Perth to ICT
-1hPerth
AWSTSOURCEICT
ICTGreen rows indicate typical business hours (9 AM - 5 PM)
AWST and ICT on the World Map
The map below highlights the AWST (Australian Western Standard Time) and ICT (Indochina 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.
ICT – Indochina Time
UTC+07:00Indochina Time (ICT) is the time zone for Vietnam, Thailand, Laos, and Cambodia, 7 hours ahead of UTC.
- •Bangkok is one of the most visited cities in the world.
- •ICT is 12 hours ahead of EST.
- •Thailand, Vietnam, and Cambodia all share ICT.
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.
Everything You Need to Know About Perth and ICT Time
Perth runs on Australian Western Standard Time (AWST) at UTC+08:00. ICT runs on Indochina Time (ICT) at UTC+07:00. That puts Perth 1 hour behind ICT — a difference of -1h at the current offsets.
In practice, when it is 9:00 AM in Perth it is 8:00 AM in ICT. Midnight in Perth is 11:00 PM in ICT. Neither zone observes daylight saving time, so the offset between them stays constant all year.
Perth to ICT time conversion table
| Perth (AWST) | ICT (ICT) | Day |
|---|---|---|
| 12:00 AM | 11:00 PM | previous day |
| 6:00 AM | 5:00 AM | same day |
| 7:00 AM | 6:00 AM | same day |
| 8:00 AM | 7:00 AM | same day |
| 9:00 AM | 8:00 AM | same day |
| 12:00 PM | 11:00 AM | same day |
| 3:00 PM | 2:00 PM | same day |
| 5:00 PM | 4:00 PM | same day |
| 6:00 PM | 5:00 PM | same day |
| 9:00 PM | 8:00 PM | same day |
Why people convert Perth to ICT time
- Scheduling a call from Perth to ICT: a 10:00 AM start in Perth lands at 9:00 AM in ICT, so you can confirm the slot without doing the arithmetic yourself.
- Finding shared working hours: both Perth and ICT are inside the 9-to-5 working day between 10:00 AM and 5:00 PM AWST time (9:00 AM–4:00 PM ICT). That is roughly 7 hours of usable overlap.
- Booking travel or deliveries: tracking ICT local time against Perth keeps pickup windows and arrival estimates honest across the -1h offset.
- Always state the zone abbreviation, not just the hour. "3:00 PM AWST" is unambiguous; "3 PM" across a -1h gap is not.
- Block 10:00 AM–5:00 PM AWST as the recurring meeting window if you work primarily from Perth and need ICT colleagues present.
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 ICT (Indochina Time)
Indochina Time (ICT) is used across Southeast Asia including Vietnam, Thailand, Laos, and Cambodia. Indonesia (Western time, WIB) also uses UTC+07:00. ICT does not observe daylight saving time.
Best time to call between Perth and ICT
Both Perth and ICT sit inside the 9 AM – 5 PM working day between 10:00 AM–5:00 PM AWST, which is 9:00 AM–4:00 PM ICT. That gives roughly 7 hours of shared time — the safest window for a live call or meeting.
Business hours overlap
Perth and ICT share 7 hours of working-hours overlap (10:00 AM–5:00 PM AWST), so scheduling a live meeting is straightforward.
Perth is 1 hour behind ICT (AWST UTC+08:00 → ICT UTC+07:00). The shared working window is 10:00 AM–5:00 PM AWST. Remember to re-check around daylight-saving transitions.
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 ICT?
Perth (AWST, UTC+08:00) is 1 hour behind ICT (ICT, UTC+07:00). The gap is currently -1h.
How do I convert Perth time to ICT time?
Add -1h to Perth local time. For example, 9:00 AM in Perth is 8:00 AM in ICT.
What time is it in ICT right now?
ICT uses ICT at UTC+07:00. Use the live converter at the top of this page — it updates in real time and already accounts for the -1h offset from Perth.
What is the best time to call ICT from Perth?
Call between 10:00 AM and 5:00 PM AWST — that maps to 9:00 AM–4:00 PM ICT and keeps both parties inside the working day.
Which is behind, Perth or ICT?
Perth is 1 hour behind ICT. When it is 12:00 PM in Perth it is 11:00 AM in ICT.
Do Perth and ICT use different time zones?
Perth (Australia) uses AWST at UTC+08:00, while ICT uses ICT at UTC+07:00. The IANA identifiers are Australia/Perth and Asia/Bangkok.
Does daylight saving time affect the Perth–ICT difference?
Neither zone observes daylight saving time, so the -1h offset between Perth and ICT 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 ICT?
Not normally. The -1h gap only pushes the date over the previous day.
What is the time difference between Perth and ICT?
ICT is -1h 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 ICT in?
ICT 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 ICT timezone?
Major cities in the ICT timezone include Bangkok, Ho Chi Minh City, Hanoi, Jakarta, Phnom Penh, Vientiane.
What is the UTC offset for ICT?
Indochina Time (ICT) is at UTC+07:00.
What should I know about the ICT timezone?
Bangkok is one of the most visited cities in the world. ICT is 12 hours ahead of EST.
When is it midnight in Perth, what time is it in ICT?
When it is 12:00 AM (midnight) in Perth (AWST), it is -1h later in ICT (ICT).
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