What is the time difference between Tokyo and Reykjavík?

Reykjavík is 9 hours behind Tokyo. 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 Reykjavík from Tokyo?

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 Tokyo observe daylight saving time?

No. Tokyo stays on UTC+9 all year, so its clocks never move.

Does Reykjavík observe daylight saving time?

No. Reykjavík stays on UTC+0 all year, so its clocks never move.

If it is midday in Tokyo, what time is it in Reykjavík?

It is 03:00 in Reykjavík, on the same calendar date. That holds for the current offsets; it does not change through the year, because neither city moves its clocks.

Which time zones do Tokyo and Reykjavík use?

Tokyo uses Asia/Tokyo, currently UTC+9, and Reykjavík uses Atlantic/Reykjavik, currently UTC+0 (GMT). Those identifiers are the ones to use in code — abbreviations are ambiguous and offsets change.

Convert Tokyo time to Reykjavík time

Right now Reykjavík runs 9 hours behind Tokyo. That gap is not fixed: it moves when either city changes its clocks.

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

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

Tokyo	Reykjavík
00:00	15:00previous day
01:00	16:00previous day
02:00	17:00previous day
03:00	18:00previous day
04:00	19:00previous day
05:00	20:00previous day
06:00	21:00previous day
07:00	22:00previous day
08:00	23:00previous day
09:00	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

Daylight saving time

Both cities keep one offset all year. Whatever difference holds today still holds in six months.

Tokyo

Does not observe daylight saving time

Standard: UTC+9

Reykjavík

Does not observe daylight saving time

Standard: UTC+0

When you can actually talk

There is no hour where both cities are inside a 09:00–18:00 working day. Someone has to move — the nearest workable windows are below.

Tokyo 09:00–03:00Reykjavík 00:00–18:00

Reference

The zone identifiers and offsets behind everything above.

	Tokyo	Reykjavík
IANA zone	Asia/Tokyo	Atlantic/Reykjavik
Abbreviation	UTC+9	GMT
Standard offset	UTC+9	UTC+0
Daylight offset	—	—
Clock changes this year	0	0
Country	Japan	Iceland

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

Common questions

What is the time difference between Tokyo and Reykjavík?: Reykjavík is 9 hours behind Tokyo. 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 Reykjavík from Tokyo?: 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 Tokyo observe daylight saving time?: No. Tokyo stays on UTC+9 all year, so its clocks never move.
Does Reykjavík observe daylight saving time?: No. Reykjavík stays on UTC+0 all year, so its clocks never move.
If it is midday in Tokyo, what time is it in Reykjavík?: It is 03:00 in Reykjavík, on the same calendar date. That holds for the current offsets; it does not change through the year, because neither city moves its clocks.
Which time zones do Tokyo and Reykjavík use?: Tokyo uses Asia/Tokyo, currently UTC+9, and Reykjavík uses Atlantic/Reykjavik, currently UTC+0 (GMT). Those identifiers are the ones to use in code — abbreviations are ambiguous and offsets change.