Does it account for Daylight Saving Time?

Yes, our converter uses the IANA timezone database, which includes all current DST rules for every timezone in the world.

UTC (Coordinated Universal Time) is the primary time standard by which the world regulates clocks. All timezones are defined as offsets from UTC.

Can I compare multiple timezones at once?

Yes, you can add multiple cities or timezones and see the equivalent times side by side.

How many timezones are there in the world?

There are 38 distinct UTC offsets in use, ranging from UTC-12 to UTC+14. This includes half-hour (UTC+5:30 India, UTC+9:30 Australia) and 45-minute offsets (UTC+5:45 Nepal, UTC+8:45 Australia).

What is the International Date Line?

The International Date Line (IDL) runs roughly along the 180° meridian in the Pacific Ocean. When you cross it westward, you gain a day; crossing eastward, you lose a day.

Why do some timezones have 30 or 45 minute offsets?

Countries chose offsets that best matched their solar noon. India uses UTC+5:30 and Nepal uses UTC+5:45 because standard hourly offsets didn't align well with their geography.

Which country has the most timezones?

France has the most (12 timezones) due to overseas territories. Russia spans 11 timezones. The US has 6 (including Hawaii and Alaska).

Vietnam to Perth

+1h

Vietnam

ICTSOURCE

UTC+07:00

HH12

MM00

12:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Perth

AWST

Australia · UTC+08:00

HH01

MM00

13:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Quick Reference

Time Conversion Table

Vietnam

Perth

12:00 AM

1:00 AM

2:00 AM

3:00 AM

4:00 AM

5:00 AM

6:00 AM

7:00 AM

8:00 AM

9:00 AM

10:00 AM

11:00 AM

12:00 PM

1:00 PM

2:00 PM

3:00 PM

4:00 PM

5:00 PM

6:00 PM

7:00 PM

8:00 PM

9:00 PM

10:00 PM

11:00 PM

Green rows indicate typical business hours (9 AM - 5 PM)

ICT and AWST on the World Map

The map below highlights the ICT (Indochina Time) and AWST (Australian Western Standard Time) timezone regions across the globe.

ICT Zone

→

AWST Zone

Explore all world timezones interactively →

ICT – Indochina Time

UTC+07:00

Indochina Time (ICT) is the time zone for Vietnam, Thailand, Laos, and Cambodia, 7 hours ahead of UTC.

Countries in ICT

ThailandVietnamCambodiaLaosIndonesia (WIB)

Major Cities in ICT

BangkokHo Chi Minh CityHanoiJakartaPhnom PenhVientiane

Key Facts about ICT

•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.

Daylight Saving:No – UTC+07:00 year-round

Learn more about ICT on Wikipedia

AWST – Australian Western Standard Time

UTC+08:00

Australian Western Standard Time (AWST) is the time zone for Western Australia, 8 hours ahead of UTC.

Countries in AWST

Australia (Western Australia)

Major Cities in AWST

PerthMandurahBunburyGeraldton

Key Facts about AWST

•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.

Daylight Saving:No – UTC+08:00 year-round

Learn more about AWST on Wikipedia

About Perth

Wikipedia

Perth operates on Australian Western Time (AWST), UTC+8 with no daylight saving. As Australia's mining capital, Perth coordinates with Asian markets.

Population:2.1 million

Metro:2.2 million

Business Hours:9:00 AM - 5:00 PM AWST

Currency:AUD (A$)

Stock Exchange:ASX (via Sydney)

Key Landmarks

Kings ParkPerth MintElizabeth QuayCottesloe BeachFremantle Prison

Did You Know?

Western Australia does not observe daylight saving time.

Learn more about AWST timezone →

Everything You Need to Know About Vietnam and Perth Time

Vietnam runs on Indochina Time (ICT) at UTC+07:00. Perth runs on Australian Western Standard Time (AWST) at UTC+08:00. That puts Vietnam 1 hour ahead of Perth — a difference of +1h at the current offsets.

In practice, when it is 9:00 AM in Vietnam it is 10:00 AM in Perth. Midnight in Vietnam is 1:00 AM in Perth. Neither zone observes daylight saving time, so the offset between them stays constant all year.

Vietnam to Perth time conversion table

Vietnam (ICT)	Perth (AWST)	Day
12:00 AM	1:00 AM	same day
6:00 AM	7:00 AM	same day
7:00 AM	8:00 AM	same day
8:00 AM	9:00 AM	same day
9:00 AM	10:00 AM	same day
12:00 PM	1:00 PM	same day
3:00 PM	4:00 PM	same day
5:00 PM	6:00 PM	same day
6:00 PM	7:00 PM	same day
9:00 PM	10:00 PM	same day

Why people convert Vietnam to Perth time

Scheduling a call from Vietnam to Perth: a 10:00 AM start in Vietnam lands at 11:00 AM in Perth, so you can confirm the slot without doing the arithmetic yourself.
Finding shared working hours: both Vietnam and Perth are inside the 9-to-5 working day between 9:00 AM and 4:00 PM ICT time (10:00 AM–5:00 PM AWST). That is roughly 7 hours of usable overlap.
Coordinating a Vietnam-based team with Perth contacts: quoting times in the other side's local clock — not your own — removes the single biggest source of missed meetings.

Always state the zone abbreviation, not just the hour. "3:00 PM ICT" is unambiguous; "3 PM" across a +1h gap is not.
Block 9:00 AM–4:00 PM ICT as the recurring meeting window if you work primarily from Vietnam and need Perth colleagues present.

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.

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.

Best time to call between Vietnam and Perth

Both Vietnam and Perth sit inside the 9 AM – 5 PM working day between 9:00 AM–4:00 PM ICT, which is 10:00 AM–5:00 PM AWST. That gives roughly 7 hours of shared time — the safest window for a live call or meeting.

Business hours overlap

Vietnam and Perth share 7 hours of working-hours overlap (9:00 AM–4:00 PM ICT), so scheduling a live meeting is straightforward.

Vietnam is 1 hour ahead of Perth (ICT UTC+07:00 → AWST UTC+08:00). The shared working window is 9:00 AM–4:00 PM ICT. 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:

⏳

History of Timekeeping

From sundials to atomic clocks - 5000 years of measuring time

🌍

How Time Zones Work

UTC, offsets, and why zones don't follow straight lines

☀️

Daylight Saving Time

DST dates, which countries observe it, and the ongoing debate

Frequently Asked Questions

What is the time difference between Vietnam and Perth?

Vietnam (ICT, UTC+07:00) is 1 hour ahead of Perth (AWST, UTC+08:00). The gap is currently +1h.

How do I convert Vietnam time to Perth time?

Add +1h to Vietnam local time. For example, 9:00 AM in Vietnam is 10:00 AM in Perth.

What time is it in Perth right now?

Perth uses AWST at UTC+08:00. Use the live converter at the top of this page — it updates in real time and already accounts for the +1h offset from Vietnam.

What is the best time to call Perth from Vietnam?

Call between 9:00 AM and 4:00 PM ICT — that maps to 10:00 AM–5:00 PM AWST and keeps both parties inside the working day.

Which is ahead, Vietnam or Perth?

Vietnam is 1 hour ahead of Perth. When it is 12:00 PM in Vietnam it is 1:00 PM in Perth.

Do Vietnam and Perth use different time zones?

Vietnam (Vietnam) uses ICT at UTC+07:00, while Perth (Australia) uses AWST at UTC+08:00. The IANA identifiers are Asia/Ho_Chi_Minh and Australia/Perth.