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Convert Chatham Time to Hawaii-Aleutian Time

CHAST · UTC+12:45 → HAST · UTC−10

CHAST is 22 hours 45 minutes ahead of HAST

Chatham · CHADT

Thursday, 8 October 2026

Adak · HADT

Wednesday, 7 October 2026

When are both sides at work?

0003060912151821
ChathamCHADT · +13:45
0003060912151821
AdakHADT · -09:00
0104071013161922

Shared working hours: 09:00–17:00 in Chatham is 10:15–18:15 in Adak.

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

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01:11 Thu 8 Oct Chatham = 02:26 Wed 7 Oct Adak

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Hour-by-hour conversion

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

About this conversion

CHAST here means Chatham Time, represented by Chatham (Pacific/Chatham), currently UTC+13:45. HAST means Hawaii-Aleutian Time, represented by Adak (America/Adak), currently UTC−9.

HAST is used by 2 zones, including United States. See every meaning of HAST.

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 10:15 HAST
  • 12:00 CHAST is 13:15 HAST
  • 15:00 CHAST is 16:15 HAST
  • 18:00 CHAST is 19:15 HAST

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