Does it handle Daylight Saving Time?

Yes, the tool automatically adjusts for Daylight Saving Time based on the specific date you select, ensuring accurate conversions year-round.

Can I add multiple cities?

Yes, you can add as many cities as you need to the dashboard to compare times across your entire global network simultaneously.

Tehran to Sydney

+6h 30m

Tehran

IRSTSOURCE

Iran · UTC+03:30

HH12

MM00

12:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Sydney

AEST

Australia · UTC+10:00DST observed

HH06

MM30

18:30 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Quick Reference

Time Conversion Table

Tehran

Sydney

12:00 AM

6:30 AM

2:00 AM

8:30 AM

4:00 AM

10:30 AM

6:00 AM

12:30 PM

8:00 AM

2:30 PM

10:00 AM

4:30 PM

12:00 PM

6:30 PM

2:00 PM

8:30 PM

4:00 PM

10:30 PM

6:00 PM

12:30 AM+1

8:00 PM

2:30 AM+1

10:00 PM

4:30 AM+1

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

IRST and AEST on the World Map

The map below highlights the IRST (Iran Standard Time) and AEST (Australian Eastern Standard Time) timezone regions across the globe.

IRST Zone

→

AEST Zone

Explore all world timezones interactively →

IRST – Iran Standard Time

UTC+03:30

Iran Standard Time (IRST) is the time zone for Iran, 3 hours and 30 minutes ahead of UTC.

Countries in IRST

Iran

Major Cities in IRST

TehranIsfahanMashhadTabrizShirazKaraj

Key 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).
•Tehran has a metropolitan population of over 16 million.

Daylight Saving:Yes – switches to IRDT

Learn more about IRST on Wikipedia

AEST – Australian Eastern Standard Time

UTC+10:00

Australian Eastern Standard Time (AEST) covers eastern Australia, 10 hours ahead of UTC.

Countries in AEST

Australia (NSW, VIC, QLD, TAS, ACT)Papua New Guinea

Major Cities in AEST

SydneyMelbourneBrisbaneCanberraHobartGold Coast

Key Facts about AEST

•Queensland does not observe daylight saving time, staying on AEST year-round.
•Sydney and Melbourne switch to AEDT (UTC+11:00) in summer.
•The Australian Securities Exchange (ASX) operates on AEST/AEDT.
•AEST is 15 hours ahead of EST during winter.

Daylight Saving:Yes – switches to AEDT

Learn more about AEST on Wikipedia

About Tehran

Wikipedia

Tehran operates on Iran Standard Time (IRST), UTC+3:30. Iran's unique half-hour offset makes Tehran time distinctive for regional business coordination.

Population:9.4 million

Metro:16.8 million

Business Hours:8:00 AM - 4:00 PM IRST

Currency:IRR (﷼)

Stock Exchange:TSE (Tehran Stock Exchange)

Key Landmarks

Azadi TowerGolestan PalaceGrand BazaarMilad TowerTabiat Bridge

Did You Know?

Iran Standard Time (IRST) is one of few timezones with a 30-minute offset (UTC+3:30).

Learn more about IRST timezone →

About Sydney

Wikipedia

Sydney operates on Australian Eastern Standard Time (AEST/AEDT). As Australia's financial capital, Sydney opens global markets at the start of the business day.

Population:5.4 million

Metro:5.4 million

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

Currency:AUD (A$)

Stock Exchange:ASX (Australian Securities Exchange)

Key Landmarks

Sydney Opera HouseSydney Harbour BridgeBondi BeachDarling HarbourRoyal Botanic Garden

Did You Know?

Sydney is one of the first major cities to welcome the New Year.

Learn more about AEST timezone →

Time Conversion Guide: Tehran to Sydney

Tehran runs on Iran Standard Time (IRST) at UTC+03:30. Sydney runs on Australian Eastern Standard Time (AEST) at UTC+10:00. That puts Tehran 6 hours 30 minutes ahead of Sydney — a difference of +6h 30m at the current offsets.

In practice, when it is 9:00 AM in Tehran it is 3:30 PM in Sydney. Midnight in Tehran is 6:30 AM in Sydney. Neither zone observes daylight saving time, so the offset between them stays constant all year.

Tehran to Sydney time conversion table

Tehran (IRST)	Sydney (AEST)	Day
12:00 AM	6:30 AM	same day
6:00 AM	12:30 PM	same day
7:00 AM	1:30 PM	same day
8:00 AM	2:30 PM	same day
9:00 AM	3:30 PM	same day
12:00 PM	6:30 PM	same day
3:00 PM	9:30 PM	same day
5:00 PM	11:30 PM	same day
6:00 PM	12:30 AM	next day
9:00 PM	3:30 AM	next day

Why people convert Tehran to Sydney time

Scheduling a call from Tehran to Sydney: a 10:00 AM start in Tehran lands at 4:30 PM in Sydney, so you can confirm the slot without doing the arithmetic yourself.
Finding shared working hours: both Tehran and Sydney are inside the 9-to-5 working day between 9:00 AM and 10:30 AM IRST time (3:30 PM–5:00 PM AEST). That is roughly 1 hours 30 minutes of usable overlap.
Booking travel or deliveries: tracking Sydney local time against Tehran keeps pickup windows and arrival estimates honest across the +6h 30m offset.

Always state the zone abbreviation, not just the hour. "3:00 PM IRST" is unambiguous; "3 PM" across a +6h 30m gap is not.
Block 9:00 AM–10:30 AM IRST as the recurring meeting window if you work primarily from Tehran and need Sydney colleagues present.
Sydney: Clocks spring forward on Sat, Oct 3, 2026. Any meeting series spanning that date will shift by an hour in local time.

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 AEST (Australian Eastern Standard Time)

Australian Eastern Standard Time (AEST) is used in the eastern states of Australia including New South Wales, Victoria, Queensland, Tasmania, and the ACT. During summer (October to April), NSW, VIC, TAS, and ACT switch to Australian Eastern Daylight Time (AEDT, UTC+11:00), while Queensland remains on AEST year-round.

Best time to call between Tehran and Sydney

Both Tehran and Sydney sit inside the 9 AM – 5 PM working day between 9:00 AM–10:30 AM IRST, which is 3:30 PM–5:00 PM AEST. That gives roughly 1 hours and 30 minutes of shared time — the safest window for a live call or meeting.

Business hours overlap

Tehran and Sydney overlap for only 90 minutes (9:00 AM–10:30 AM IRST), so meetings have to be booked precisely.

Tehran is 6 hours 30 minutes ahead of Sydney (IRST UTC+03:30 → AEST UTC+10:00). The shared working window is 9:00 AM–10:30 AM IRST. Remember to re-check around daylight-saving transitions.

🕐 Daylight Saving Time Info

Tehran

Does not observe DST

Sydney

❄ Currently in Standard Time

Standard: UTC+10:00 · DST: UTC+11:00

Clocks spring forward on Sat, Oct 3, 2026

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 Tehran and Sydney?

Tehran (IRST, UTC+03:30) is 6 hours 30 minutes ahead of Sydney (AEST, UTC+10:00). The gap is currently +6h 30m.

How do I convert Tehran time to Sydney time?

Add +6h 30m to Tehran local time. For example, 9:00 AM in Tehran is 3:30 PM in Sydney.

What time is it in Sydney right now?

Sydney uses AEST at UTC+10:00. Use the live converter at the top of this page — it updates in real time and already accounts for the +6h 30m offset from Tehran.

What is the best time to call Sydney from Tehran?

Call between 9:00 AM and 10:30 AM IRST — that maps to 3:30 PM–5:00 PM AEST and keeps both parties inside the working day.

Which is ahead, Tehran or Sydney?

Tehran is 6 hours 30 minutes ahead of Sydney. When it is 12:00 PM in Tehran it is 6:30 PM in Sydney.

Do Tehran and Sydney use different time zones?

Tehran (Iran) uses IRST at UTC+03:30, while Sydney (Australia) uses AEST at UTC+10:00. The IANA identifiers are Asia/Tehran and Australia/Sydney.

Does daylight saving time affect the Tehran–Sydney difference?

Neither zone observes daylight saving time, so the +6h 30m offset between Tehran and Sydney 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 Sydney?

Not normally. The +6h 30m gap only pushes the date over for late-evening times.

What is the time difference between Tehran and Sydney?

Sydney is +6h 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 Sydney in?

Sydney operates on Australian Eastern Standard Time (AEST/AEDT). As Australia's financial capital, Sydney opens global markets at the start of the business day.

What are the business hours in Tehran?

Standard business hours in Tehran are 8:00 AM - 4:00 PM IRST.

What are the business hours in Sydney?

Standard business hours in Sydney are 9:00 AM - 5:00 PM AEST.

What is the best time to schedule a call between Tehran and Sydney?

The best overlap for a call is when both cities are in business hours. Tehran works 8:00 AM - 4:00 PM IRST and Sydney works 9:00 AM - 5:00 PM AEST (+6h 30m difference). Try scheduling during the overlapping window for maximum convenience.

What currencies are used in Tehran and Sydney?

Tehran uses IRR (﷼) while Sydney uses AUD (A$). Check current exchange rates when planning travel or business between these cities.

How do Tehran and Sydney compare in size?

Tehran has a population of approximately 9.4 million (metro: 16.8 million), while Sydney has approximately 5.4 million (metro: 5.4 million).

What are the major landmarks in Tehran and Sydney?

Tehran is known for Azadi Tower, Golestan Palace, Grand Bazaar. Sydney is famous for Sydney Opera House, Sydney Harbour Bridge, Bondi Beach.

Do Tehran and Sydney have stock exchanges?

Yes. Tehran has the TSE (Tehran Stock Exchange) and Sydney has the ASX (Australian Securities Exchange). The +6h 30m time difference affects trading hour overlaps between these exchanges.