What is the time difference between Tehran and Sydney?

Sydney is 6 hours 30 minutes ahead of Tehran. That figure is current — it changes by an hour when either city starts or ends daylight saving, and the exact dates are listed above.

When is the best time to call Sydney from Tehran?

Between 09:00–11:30 in Tehran, which is 15:30–18:00 in Sydney. That is the only stretch where both cities are inside a 09:00–18:00 day.

Does Tehran observe daylight saving time?

No. Tehran stays on UTC+3:30 all year, so its clocks never move.

Does Sydney observe daylight saving time?

Yes. Sydney runs on UTC+10 in winter and UTC+11 in summer. The next change is on 2026-10-04, when clocks go forward by 60 minutes.

If it is midday in Tehran, what time is it in Sydney?

It is 18:30 in Sydney, on the same calendar date. That holds for the current offsets; it shifts by an hour around the daylight saving dates listed above.

Which time zones do Tehran and Sydney use?

Tehran uses Asia/Tehran, currently UTC+3:30, and Sydney uses Australia/Sydney, currently UTC+10 (AEST). Those identifiers are the ones to use in code — abbreviations are ambiguous and offsets change.

Convert Tehran time to Sydney time

Sydney is 6 hours 30 minutes ahead of Tehran right now, so midday in Tehran lands in the evening in Sydney.

Convert a time

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Date

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Converted time

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The converter needs JavaScript to run. Everything below — offsets, daylight saving dates and the hour-by-hour table — is part of the page and works without it.

Hour by hour

Every hour of a day in Tehran, and what the clock reads in Sydney at that same moment.

Tehran	Sydney
00:00	06:30
01:00	07:30
02:00	08:30
03:00	09:30
04:00	10:30
05:00	11:30
06:00	12:30
07:00	13:30
08:00	14:30
09:00	15:30
10:00	16:30
11:00	17:30
12:00	18:30
13:00	19:30
14:00	20:30
15:00	21:30
16:00	22:30
17:00	23:30
18:00	00:30next day
19:00	01:30next day
20:00	02:30next day
21:00	03:30next day
22:00	04:30next day
23:00	05:30next day

Daylight saving time

Tehran keeps one offset all year while Sydney moves twice. That is the whole reason this difference is seasonal.

Tehran

Does not observe daylight saving time

Standard: UTC+3:30

Sydney

Observes daylight saving time

Standard: UTC+10
Daylight: UTC+11
Next change: 2026-10-04 +60m

When you can actually talk

You have 2 hours 30 minutes of shared working time: 09:00–11:30 in Tehran, which is 15:30–18:00 in Sydney.

Tehran 09:00–11:30Sydney 15:30–18:00

Reference

The zone identifiers and offsets behind everything above.

	Tehran	Sydney
IANA zone	Asia/Tehran	Australia/Sydney
Abbreviation	UTC+3:30	AEST
Standard offset	UTC+3:30	UTC+10
Daylight offset	—	UTC+11
Clock changes this year	0	2
Country	Iran	Australia

Example, not the current time. Live times appear once the page loads.

Common questions

What is the time difference between Tehran and Sydney?: Sydney is 6 hours 30 minutes ahead of Tehran. That figure is current — it changes by an hour when either city starts or ends daylight saving, and the exact dates are listed above.
When is the best time to call Sydney from Tehran?: Between 09:00–11:30 in Tehran, which is 15:30–18:00 in Sydney. That is the only stretch where both cities are inside a 09:00–18:00 day.
Does Tehran observe daylight saving time?: No. Tehran stays on UTC+3:30 all year, so its clocks never move.
Does Sydney observe daylight saving time?: Yes. Sydney runs on UTC+10 in winter and UTC+11 in summer. The next change is on 2026-10-04, when clocks go forward by 60 minutes.
If it is midday in Tehran, what time is it in Sydney?: It is 18:30 in Sydney, on the same calendar date. That holds for the current offsets; it shifts by an hour around the daylight saving dates listed above.
Which time zones do Tehran and Sydney use?: Tehran uses Asia/Tehran, currently UTC+3:30, and Sydney uses Australia/Sydney, currently UTC+10 (AEST). Those identifiers are the ones to use in code — abbreviations are ambiguous and offsets change.