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Convert Chatham Time to Cook Islands Time

CHAST · UTC+12:45 → CKT · UTC−10

CHAST is 22 hours 45 minutes ahead of CKT

Today Chatham is on CHADT (UTC+13:45) and Avarua on UTC-10 (UTC−10), so right now Chatham is 23 hours 45 minutes ahead of Avarua.

Chatham · CHADT

Thursday, 8 October 2026

Avarua · UTC-10

Wednesday, 7 October 2026

When are both sides at work?

0003060912151821
ChathamCHADT · +13:45
0003060912151821
AvaruaUTC-10 · -10:00
0003060912151821

Shared working hours: 09:00–18:00 in Chatham is 09:15–18:15 in Avarua.

Working (09–18) Awake, off the clock Asleep (23–07)

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01:11 Thu 8 Oct Chatham = 01:26 Wed 7 Oct Avarua

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Hour-by-hour conversion

Chatham (CHAST)Avarua (CKT)
00:0000:15prev. day
01:0001:15prev. dayNow
02:0002:15prev. day
03:0003:15prev. day
04:0004:15prev. day
05:0005:15prev. day
06:0006:15prev. day
07:0007:15prev. day
08:0008:15prev. day
09:0009:15prev. dayBoth at work
10:0010:15prev. dayBoth at work
11:0011:15prev. dayBoth at work
12:0012:15prev. dayBoth at work
13:0013:15prev. dayBoth at work
14:0014:15prev. dayBoth at work
15:0015:15prev. dayBoth at work
16:0016:15prev. dayBoth at work
17:0017:15prev. dayBoth at work
18:0018:15prev. day
19:0019:15prev. day
20:0020:15prev. day
21:0021:15prev. day
22:0022:15prev. day
23:0023:15prev. day

About this conversion

CHAST here means Chatham Time, represented by Chatham (Pacific/Chatham), currently UTC+13:45. CKT means Cook Islands Time, represented by Avarua (Pacific/Rarotonga), currently UTC−10.

Working hours are shown as 09:00–18:00 local, and sleeping hours as 23:00–07:00. The hour table is anchored on the current day in Chatham; day boundaries are marked where the date differs.

Quick answers

  • 09:00 CHAST is 09:15 CKT
  • 12:00 CHAST is 12:15 CKT
  • 15:00 CHAST is 15:15 CKT
  • 18:00 CHAST is 18:15 CKT

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