IRST to AEDT
+7h 30mIRST
IRSTSOURCEAEDT
AEDTGreen rows indicate typical business hours (9 AM - 5 PM)
IRST and AEDT on the World Map
The map below highlights the IRST (Iran Standard Time) and AEDT (Australian Eastern Daylight 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.
AEDT – Australian Eastern Daylight Time
UTC+11:00Australian Eastern Daylight Time (AEDT, UTC+11:00) is the daylight saving period in south-eastern Australia, from October to April.
- •AEDT runs from the first Sunday in October to the first Sunday in April.
- •AEDT is one hour ahead of Australian Eastern Standard Time (AEST).
- •Queensland does not observe daylight saving, so Brisbane stays on AEST.
- •During AEDT, Sydney is 16 hours ahead of New York and 11 hours ahead of UTC.
IRST vs AEDT: Offsets, DST and Best Call Times
IRST runs on Iran Standard Time (IRST) at UTC+03:30. AEDT runs on Australian Eastern Daylight Time (AEDT) at UTC+11:00. That puts IRST 7 hours 30 minutes ahead of AEDT — a difference of +7h 30m at the current offsets.
In practice, when it is 9:00 AM in IRST it is 4:30 PM in AEDT. Midnight in IRST is 7:30 AM in AEDT. Neither zone observes daylight saving time, so the offset between them stays constant all year.
IRST to AEDT time conversion table
| IRST (IRST) | AEDT (AEDT) | Day |
|---|---|---|
| 12:00 AM | 7:30 AM | same day |
| 6:00 AM | 1:30 PM | same day |
| 7:00 AM | 2:30 PM | same day |
| 8:00 AM | 3:30 PM | same day |
| 9:00 AM | 4:30 PM | same day |
| 12:00 PM | 7:30 PM | same day |
| 3:00 PM | 10:30 PM | same day |
| 5:00 PM | 12:30 AM | next day |
| 6:00 PM | 1:30 AM | next day |
| 9:00 PM | 4:30 AM | next day |
Why people convert IRST to AEDT time
- Scheduling a call from IRST to AEDT: a 10:00 AM start in IRST lands at 5:30 PM in AEDT, so you can confirm the slot without doing the arithmetic yourself.
- Finding shared working hours: both IRST and AEDT are inside the 9-to-5 working day between 9:00 AM and 9:30 AM IRST time (4:30 PM–5:00 PM AEDT). That is roughly 0 hours 30 minutes of usable overlap.
- Coordinating a IRST-based team with AEDT 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 IRST" is unambiguous; "3 PM" across a +7h 30m gap is not.
- Block 9:00 AM–9:30 AM IRST as the recurring meeting window if you work primarily from IRST and need AEDT 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 AEDT (Australian Eastern Daylight Time)
Australian Eastern Daylight Time (AEDT) is the daylight saving period in south-eastern Australia, one hour ahead of Australian Eastern Standard Time (AEST, UTC+10:00). Because Australia is in the southern hemisphere, AEDT runs through the summer — from the first Sunday in October to the first Sunday in April — which is almost exactly the reverse of the European and North American schedules. New South Wales, Victoria, Tasmania and the Australian Capital Territory observe it; Queensland and the Northern Territory do not, so Brisbane stays on AEST year round while Sydney moves to AEDT. During AEDT, Sydney is 11 hours ahead of UTC and 16 hours ahead of New York.
Best time to call between IRST and AEDT
Both IRST and AEDT sit inside the 9 AM – 5 PM working day between 9:00 AM–9:30 AM IRST, which is 4:30 PM–5:00 PM AEDT. That gives roughly 0 hours and 30 minutes of shared time — the safest window for a live call or meeting.
Business hours overlap
IRST and AEDT overlap for only 30 minutes (9:00 AM–9:30 AM IRST), so meetings have to be booked precisely.
IRST is 7 hours 30 minutes ahead of AEDT (IRST UTC+03:30 → AEDT UTC+11:00). The shared working window is 9:00 AM–9:30 AM IRST. Remember to re-check around daylight-saving transitions.
🕐 Daylight Saving Time Info
IRST
Does not observe DST
AEDT
❄ 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:
Frequently Asked Questions
What is the time difference between IRST and AEDT?
IRST (IRST, UTC+03:30) is 7 hours 30 minutes ahead of AEDT (AEDT, UTC+11:00). The gap is currently +7h 30m.
How do I convert IRST time to AEDT time?
Add +7h 30m to IRST local time. For example, 9:00 AM in IRST is 4:30 PM in AEDT.
What time is it in AEDT right now?
AEDT uses AEDT at UTC+11:00. Use the live converter at the top of this page — it updates in real time and already accounts for the +7h 30m offset from IRST.
What is the best time to call AEDT from IRST?
Call between 9:00 AM and 9:30 AM IRST — that maps to 4:30 PM–5:00 PM AEDT and keeps both parties inside the working day.
Which is ahead, IRST or AEDT?
IRST is 7 hours 30 minutes ahead of AEDT. When it is 12:00 PM in IRST it is 7:30 PM in AEDT.
Does daylight saving time affect the IRST–AEDT difference?
Neither zone observes daylight saving time, so the +7h 30m offset between IRST and AEDT is fixed all year.
Which other cities share IRST's time zone?
IRST also covers Tehran, Isfahan, Mashhad, Tabriz, Shiraz, Karaj.
Which countries use IRST, IRST's zone?
IRST is used in Iran.
Is there a day difference between IRST and AEDT?
Not normally. The +7h 30m gap only pushes the date over for late-evening times.
What is the time difference between IRST and AEDT?
AEDT is +7h 30m from IRST.
What timezone is IRST in?
IRST operates on its local timezone.
What timezone is AEDT in?
AEDT operates on its local timezone.
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 AEDT timezone?
Major cities in the AEDT timezone include Sydney, Melbourne, Canberra, Hobart, Newcastle.
What is the UTC offset for AEDT?
Australian Eastern Daylight Time (AEDT) is at UTC+11:00. During daylight saving time, it shifts to AEDT.
What should I know about the AEDT timezone?
AEDT runs from the first Sunday in October to the first Sunday in April. AEDT is one hour ahead of Australian Eastern Standard Time (AEST).
When is it midnight in IRST, what time is it in AEDT?
When it is 12:00 AM (midnight) in IRST (IRST), it is +7h 30m later in AEDT (AEDT).
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