What is the time difference between Chatham Islands and Tokyo?

Tokyo is 3 hours 45 minutes behind Chatham Islands. 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 Tokyo from Chatham Islands?

Between 12:45–18:00 in Chatham Islands, which is 09:00–14:15 in Tokyo. That is the only stretch where both cities are inside a 09:00–18:00 day.

Does Chatham Islands observe daylight saving time?

Yes. Chatham Islands runs on UTC+12:45 in winter and UTC+13:45 in summer. The next change is on 2026-09-27, when clocks go forward by 60 minutes.

Does Tokyo observe daylight saving time?

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

If it is midday in Chatham Islands, what time is it in Tokyo?

It is 08:15 in Tokyo, 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 Chatham Islands and Tokyo use?

Chatham Islands uses Pacific/Chatham, currently UTC+12:45 (CHAST), and Tokyo uses Asia/Tokyo, currently UTC+9. Those identifiers are the ones to use in code — abbreviations are ambiguous and offsets change.

Convert Chatham Islands time to Tokyo time

Right now Tokyo runs 3 hours 45 minutes behind Chatham Islands. That gap is not fixed: it moves when either city changes its clocks.

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

The whole day mapped across: read down the left for Chatham Islands, across for Tokyo.

Chatham Islands	Tokyo
00:00	20:15previous day
01:00	21:15previous day
02:00	22:15previous day
03:00	23:15previous day
04:00	00:15
05:00	01:15
06:00	02:15
07:00	03:15
08:00	04:15
09:00	05:15
10:00	06:15
11:00	07:15
12:00	08:15
13:00	09:15
14:00	10:15
15:00	11:15
16:00	12:15
17:00	13:15
18:00	14:15
19:00	15:15
20:00	16:15
21:00	17:15
22:00	18:15
23:00	19:15

Daylight saving time

Chatham Islands changes its clocks; Tokyo does not. The difference between them therefore shifts by an hour twice a year.

Chatham Islands

Observes daylight saving time

Standard: UTC+12:45
Daylight: UTC+13:45
Next change: 2026-09-27 +60m

Tokyo

Does not observe daylight saving time

Standard: UTC+9

When you can actually talk

The window is 5 hours 15 minutes wide — 12:45–18:00 in Chatham Islands, 09:00–14:15 in Tokyo.

Chatham Islands 12:45–18:00Tokyo 09:00–14:15

Reference

The zone identifiers and offsets behind everything above.

	Chatham Islands	Tokyo
IANA zone	Pacific/Chatham	Asia/Tokyo
Abbreviation	CHAST	UTC+9
Standard offset	UTC+12:45	UTC+9
Daylight offset	UTC+13:45	—
Clock changes this year	2	0
Country	New Zealand	Japan

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

Common questions

What is the time difference between Chatham Islands and Tokyo?: Tokyo is 3 hours 45 minutes behind Chatham Islands. 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 Tokyo from Chatham Islands?: Between 12:45–18:00 in Chatham Islands, which is 09:00–14:15 in Tokyo. That is the only stretch where both cities are inside a 09:00–18:00 day.
Does Chatham Islands observe daylight saving time?: Yes. Chatham Islands runs on UTC+12:45 in winter and UTC+13:45 in summer. The next change is on 2026-09-27, when clocks go forward by 60 minutes.
Does Tokyo observe daylight saving time?: No. Tokyo stays on UTC+9 all year, so its clocks never move.
If it is midday in Chatham Islands, what time is it in Tokyo?: It is 08:15 in Tokyo, 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 Chatham Islands and Tokyo use?: Chatham Islands uses Pacific/Chatham, currently UTC+12:45 (CHAST), and Tokyo uses Asia/Tokyo, currently UTC+9. Those identifiers are the ones to use in code — abbreviations are ambiguous and offsets change.