Cook Islands to Sydney time converter

Sydney is 21 hours ahead of Cook Islands. When it is 9:00 AM in Cook Islands, it is 6:00 AM (Tue, Oct 20) in Sydney.

Cook Islands UTC-10

Monday, October 19, 2026

Sydney AEDT

Tuesday, October 20, 2026

Cook Islands
Mon, Oct 19
UTC-10
Sydney
New South Wales, Australia
Tue, Oct 20
AEDTUTC+11+21h
Finding your time zone…
Shared working hours (9:00–18:00)

Cook Islands to Sydney conversion table

Every hour of today in Cook Islands and the matching time in Sydney. Light rows are typical working hours (9:00–18:00).

Cook IslandsSydney
12:00 AM9:00 PM
1:00 AM10:00 PM
2:00 AM11:00 PM
3:00 AM12:00 AM+1 day
4:00 AM1:00 AM+1 day
5:00 AM2:00 AM+1 day
6:00 AM3:00 AM+1 day
7:00 AM4:00 AM+1 day
8:00 AM5:00 AM+1 day
9:00 AM6:00 AM+1 day
10:00 AM7:00 AM+1 day
11:00 AM8:00 AM+1 day
12:00 PM9:00 AM+1 day
1:00 PM10:00 AM+1 day
2:00 PM11:00 AM+1 day
3:00 PM12:00 PM+1 day
4:00 PM1:00 PM+1 day
5:00 PM2:00 PM+1 day
6:00 PM3:00 PM+1 day
7:00 PM4:00 PM+1 day
8:00 PM5:00 PM+1 day
9:00 PM6:00 PM+1 day
10:00 PM7:00 PM+1 day
11:00 PM8:00 PM+1 day

Best time to call or meet

Both sides are at work from 12:00 PM – 6:00 PM in Cook Islands (9:00 AM – 3:00 PM in Sydney).

Daylight saving time and the difference

The difference changes during the year because Cook Islands and Sydney switch clocks on different dates:

  • Oct 19, 2026 – Apr 3, 2027: +21h
  • Apr 3, 2027 – Oct 2, 2027: +20h
  • Oct 2, 2027 – Oct 19, 2027: +21h

More conversions

Sydney to Cook IslandsCook Islands to New YorkCook Islands to LondonCook Islands to Los AngelesCook Islands to ChicagoCook Islands to TorontoCook Islands to São PauloCook Islands to ParisCook Islands to BerlinCook Islands to MoscowCook Islands to DubaiCook Islands to New DelhiCook Islands to Bangkok
New York to SydneyLondon to SydneyLos Angeles to SydneyChicago to SydneyToronto to SydneySão Paulo to SydneyParis to SydneyBerlin to SydneyMoscow to SydneyDubai to SydneyNew Delhi to SydneyBangkok to Sydney

Questions and answers

What is the time difference between Cook Islands and Sydney?

Sydney is 21 hours ahead of Cook Islands.

What time is it in Sydney when it is 9 AM in Cook Islands?

When it is 9:00 AM in Cook Islands, it is 6:00 AM (Tue, Oct 20) in Sydney.

When is the best time to call Sydney from Cook Islands?

Both sides are at work from 12:00 PM – 6:00 PM in Cook Islands (9:00 AM – 3:00 PM in Sydney).

Does the time difference between Cook Islands and Sydney change?

Yes, for part of the year, because daylight saving time starts and ends on different dates or applies on one side only.