What is the time difference between Reykjavík and Sydney?

Sydney is 10 hours ahead of Reykjavík. 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 Reykjavík?

There is no time inside normal working hours in both cities, so someone has to take the call outside them. The nearest workable windows are listed above — pick one and alternate who gets the awkward slot.

Does Reykjavík observe daylight saving time?

No. Reykjavík stays on UTC+0 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 Reykjavík, what time is it in Sydney?

It is 22:00 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 Reykjavík and Sydney use?

Reykjavík uses Atlantic/Reykjavik, currently UTC+0 (GMT), 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 Reykjavík time to Sydney time

Sydney is 10 hours ahead of Reykjavík right now, so midday in Reykjavík lands in the late night in Sydney.

Convert a time

From

Date

Time

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

The whole day mapped across: read down the left for Reykjavík, across for Sydney.

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

Daylight saving time

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

Reykjavík

Does not observe daylight saving time

Standard: UTC+0

Sydney

Observes daylight saving time

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

When you can actually talk

A standard working day in Reykjavík and one in Sydney do not overlap at all. Any call between them is early for one side or late for the other.

Reykjavík 00:00–08:00Sydney 10:00–18:00
Reykjavík 09:00–18:00Sydney 19:00–04:00

Reference

The zone identifiers and offsets behind everything above.

	Reykjavík	Sydney
IANA zone	Atlantic/Reykjavik	Australia/Sydney
Abbreviation	GMT	AEST
Standard offset	UTC+0	UTC+10
Daylight offset	—	UTC+11
Clock changes this year	0	2
Country	Iceland	Australia

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

Common questions

What is the time difference between Reykjavík and Sydney?: Sydney is 10 hours ahead of Reykjavík. 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 Reykjavík?: There is no time inside normal working hours in both cities, so someone has to take the call outside them. The nearest workable windows are listed above — pick one and alternate who gets the awkward slot.
Does Reykjavík observe daylight saving time?: No. Reykjavík stays on UTC+0 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 Reykjavík, what time is it in Sydney?: It is 22:00 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 Reykjavík and Sydney use?: Reykjavík uses Atlantic/Reykjavik, currently UTC+0 (GMT), and Sydney uses Australia/Sydney, currently UTC+10 (AEST). Those identifiers are the ones to use in code — abbreviations are ambiguous and offsets change.