Tehran to AWST
+4h 30mTehran
IRSTSOURCEAWST
AWSTGreen rows indicate typical business hours (9 AM - 5 PM)
IRST and AWST on the World Map
The map below highlights the IRST (Iran Standard Time) and AWST (Australian Western Standard Time) timezone regions across the globe.
IRST – Iran Standard Time
UTC+03:30Iran Standard Time (IRST) is the time zone for Iran, 3 hours and 30 minutes ahead of UTC.
- •IRST is one of only a few time zones with a 30-minute offset.
- •Iran observes daylight saving time, switching to IRDT (UTC+04:30).
- •Tehran has a metropolitan population of over 16 million.
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.
About Tehran
WikipediaTehran operates on Iran Standard Time (IRST), UTC+3:30. Iran's unique half-hour offset makes Tehran time distinctive for regional business coordination.
Iran Standard Time (IRST) is one of few timezones with a 30-minute offset (UTC+3:30).
Tehran to AWST Time Difference – Complete Guide
Tehran runs on Iran Standard Time (IRST) at UTC+03:30. AWST runs on Australian Western Standard Time (AWST) at UTC+08:00. That puts Tehran 4 hours 30 minutes ahead of AWST — a difference of +4h 30m at the current offsets.
In practice, when it is 9:00 AM in Tehran it is 1:30 PM in AWST. Midnight in Tehran is 4:30 AM in AWST. Neither zone observes daylight saving time, so the offset between them stays constant all year.
Tehran to AWST time conversion table
| Tehran (IRST) | AWST (AWST) | Day |
|---|---|---|
| 12:00 AM | 4:30 AM | same day |
| 6:00 AM | 10:30 AM | same day |
| 7:00 AM | 11:30 AM | same day |
| 8:00 AM | 12:30 PM | same day |
| 9:00 AM | 1:30 PM | same day |
| 12:00 PM | 4:30 PM | same day |
| 3:00 PM | 7:30 PM | same day |
| 5:00 PM | 9:30 PM | same day |
| 6:00 PM | 10:30 PM | same day |
| 9:00 PM | 1:30 AM | next day |
Why people convert Tehran to AWST time
- Scheduling a call from Tehran to AWST: a 10:00 AM start in Tehran lands at 2:30 PM in AWST, so you can confirm the slot without doing the arithmetic yourself.
- Finding shared working hours: both Tehran and AWST are inside the 9-to-5 working day between 9:00 AM and 12:30 PM IRST time (1:30 PM–5:00 PM AWST). That is roughly 3 hours 30 minutes of usable overlap.
- Booking travel or deliveries: tracking AWST local time against Tehran keeps pickup windows and arrival estimates honest across the +4h 30m offset.
- Always state the zone abbreviation, not just the hour. "3:00 PM IRST" is unambiguous; "3 PM" across a +4h 30m gap is not.
- Block 9:00 AM–12:30 PM IRST as the recurring meeting window if you work primarily from Tehran and need AWST colleagues present.
About IRST (Iran Standard Time)
Iran Standard Time (IRST) is one of the few time zones with a 30-minute offset. Iran observes daylight saving time (IRDT, UTC+04:30) from late March to late September. Tehran, the capital, is one of the largest cities in the Middle East.
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 Tehran and AWST
Both Tehran and AWST sit inside the 9 AM – 5 PM working day between 9:00 AM–12:30 PM IRST, which is 1:30 PM–5:00 PM AWST. That gives roughly 3 hours and 30 minutes of shared time — the safest window for a live call or meeting.
Business hours overlap
Tehran and AWST overlap for about 3 hours during the working day — enough for meetings if you avoid the edges of the window.
Tehran is 4 hours 30 minutes ahead of AWST (IRST UTC+03:30 → AWST UTC+08:00). The shared working window is 9:00 AM–12:30 PM IRST. 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 Tehran and AWST?
Tehran (IRST, UTC+03:30) is 4 hours 30 minutes ahead of AWST (AWST, UTC+08:00). The gap is currently +4h 30m.
How do I convert Tehran time to AWST time?
Add +4h 30m to Tehran local time. For example, 9:00 AM in Tehran is 1:30 PM in AWST.
What time is it in AWST right now?
AWST 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 +4h 30m offset from Tehran.
What is the best time to call AWST from Tehran?
Call between 9:00 AM and 12:30 PM IRST — that maps to 1:30 PM–5:00 PM AWST and keeps both parties inside the working day.
Which is ahead, Tehran or AWST?
Tehran is 4 hours 30 minutes ahead of AWST. When it is 12:00 PM in Tehran it is 4:30 PM in AWST.
Do Tehran and AWST use different time zones?
Tehran (Iran) uses IRST at UTC+03:30, while AWST uses AWST at UTC+08:00. The IANA identifiers are Asia/Tehran and Australia/Perth.
Does daylight saving time affect the Tehran–AWST difference?
Neither zone observes daylight saving time, so the +4h 30m offset between Tehran and AWST is fixed all year.
Which other cities share Tehran's time zone?
IRST also covers Tehran, Isfahan, Mashhad, Tabriz, Shiraz, Karaj.
Which countries use IRST, Tehran's zone?
IRST is used in Iran.
Is there a day difference between Tehran and AWST?
Not normally. The +4h 30m gap only pushes the date over for late-evening times.
What is the time difference between Tehran and AWST?
AWST is +4h 30m from Tehran.
What timezone is Tehran in?
Tehran operates on Iran Standard Time (IRST), UTC+3:30. Iran's unique half-hour offset makes Tehran time distinctive for regional business coordination.
What timezone is AWST in?
AWST operates on its local timezone.
What are the business hours in Tehran?
Standard business hours in Tehran are 8:00 AM - 4:00 PM IRST.
Which countries use IRST (Iran Standard Time)?
IRST is used in Iran.
Does IRST observe daylight saving time?
Yes, IRST switches to IRDT during summer months.
What are some interesting facts about IRST?
IRST is one of only a few time zones with a 30-minute offset. Iran observes daylight saving time, switching to IRDT (UTC+04:30).
Which cities are in the AWST timezone?
Major cities in the AWST timezone include Perth, Mandurah, Bunbury, Geraldton.
What is the UTC offset for AWST?
Australian Western Standard Time (AWST) is at UTC+08:00.
What should I know about the AWST timezone?
Western Australia does not observe daylight saving time. Perth is the most isolated major city in the world.
When is it midnight in Tehran, what time is it in AWST?
When it is 12:00 AM (midnight) in Tehran (IRST), it is +4h 30m later in AWST (AWST).
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