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Convert Hawaii-Aleutian Time to Tonga Time

HAST · UTC−9 → TOT · UTC+13

HAST is 22 hours behind TOT

Adak · HADT

Monday, 7 September 2026

Nuku‘alofa · UTC+13

Tuesday, 8 September 2026

When are both sides at work?

0003060912151821
AdakHADT · -09:00
0003060912151821
Nuku‘alofaUTC+13 · +13:00
2201040710131619

Shared working hours: 11:00–18:00 in Adak is 09:00–16:00 in Nuku‘alofa.

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

Pick a time and share it

22:06 Mon 7 Sep Adak = 20:06 Tue 8 Sep Nuku‘alofa

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Hour-by-hour conversion

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

About this conversion

HAST here means Hawaii-Aleutian Time, represented by Adak (America/Adak), currently UTC−9. TOT means Tonga Time, represented by Nuku‘alofa (Pacific/Tongatapu), currently UTC+13.

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 07:00 TOT
  • 12:00 HAST is 10:00 TOT
  • 15:00 HAST is 13:00 TOT
  • 18:00 HAST is 16:00 TOT

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