What is the time difference between Singapore and Chatham Islands?

Chatham Islands is 4 hours 45 minutes ahead of Singapore. 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 Chatham Islands from Singapore?

Between 09:00–13:15 in Singapore, which is 13:45–18:00 in Chatham Islands. That is the only stretch where both cities are inside a 09:00–18:00 day.

Does Singapore observe daylight saving time?

No. Singapore stays on UTC+8 all year, so its clocks never move.

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.

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

It is 16:45 in Chatham Islands, 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 Singapore and Chatham Islands use?

Singapore uses Asia/Singapore, currently UTC+8, and Chatham Islands uses Pacific/Chatham, currently UTC+12:45 (CHAST). Those identifiers are the ones to use in code — abbreviations are ambiguous and offsets change.

Convert Singapore time to Chatham Islands time

Right now Chatham Islands runs 4 hours 45 minutes ahead of Singapore. 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 Singapore, across for Chatham Islands.

Singapore	Chatham Islands
00:00	04:45
01:00	05:45
02:00	06:45
03:00	07:45
04:00	08:45
05:00	09:45
06:00	10:45
07:00	11:45
08:00	12:45
09:00	13:45
10:00	14:45
11:00	15:45
12:00	16:45
13:00	17:45
14:00	18:45
15:00	19:45
16:00	20:45
17:00	21:45
18:00	22:45
19:00	23:45
20:00	00:45next day
21:00	01:45next day
22:00	02:45next day
23:00	03:45next day

Daylight saving time

Singapore keeps one offset all year while Chatham Islands moves twice. That is the whole reason this difference is seasonal.

Singapore

Does not observe daylight saving time

Standard: UTC+8

Chatham Islands

Observes daylight saving time

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

When you can actually talk

You have 4 hours 15 minutes of shared working time: 09:00–13:15 in Singapore, which is 13:45–18:00 in Chatham Islands.

Singapore 09:00–13:15Chatham Islands 13:45–18:00

Reference

The zone identifiers and offsets behind everything above.

	Singapore	Chatham Islands
IANA zone	Asia/Singapore	Pacific/Chatham
Abbreviation	UTC+8	CHAST
Standard offset	UTC+8	UTC+12:45
Daylight offset	—	UTC+13:45
Clock changes this year	0	2
Country	Singapore	New Zealand

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

Common questions

What is the time difference between Singapore and Chatham Islands?: Chatham Islands is 4 hours 45 minutes ahead of Singapore. 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 Chatham Islands from Singapore?: Between 09:00–13:15 in Singapore, which is 13:45–18:00 in Chatham Islands. That is the only stretch where both cities are inside a 09:00–18:00 day.
Does Singapore observe daylight saving time?: No. Singapore stays on UTC+8 all year, so its clocks never move.
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.
If it is midday in Singapore, what time is it in Chatham Islands?: It is 16:45 in Chatham Islands, 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 Singapore and Chatham Islands use?: Singapore uses Asia/Singapore, currently UTC+8, and Chatham Islands uses Pacific/Chatham, currently UTC+12:45 (CHAST). Those identifiers are the ones to use in code — abbreviations are ambiguous and offsets change.