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Convert Hawaii-Aleutian Time to Singapore Time

HAST · UTC−9 → SGT · UTC+8

HAST is 17 hours behind SGT

Adak · HADT

Monday, 7 September 2026

Singapore · SGT

Tuesday, 8 September 2026

When are both sides at work?

0003060912151821
AdakHADT · -09:00
0003060912151821
SingaporeSGT · +08:00
1720230205081114

Shared working hours: 16:00–18:00 in Adak is 09:00–11:00 in Singapore.

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

Pick a time and share it

22:06 Mon 7 Sep Adak = 15:06 Tue 8 Sep Singapore

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Hour-by-hour conversion

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

About this conversion

HAST here means Hawaii-Aleutian Time, represented by Adak (America/Adak), currently UTC−9. SGT means Singapore Time, represented by Singapore (Asia/Singapore), currently UTC+8.

HAST is used by 2 zones, including United States. If you meant a different one, 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 Adak; day boundaries are marked where the date differs.

Quick answers

  • 09:00 HAST is 02:00 SGT
  • 12:00 HAST is 05:00 SGT
  • 15:00 HAST is 08:00 SGT
  • 18:00 HAST is 11:00 SGT

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