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Convert Gilbert Islands Time to Hawaii-Aleutian Time

GILT · UTC+12 → HAST · UTC−9

GILT is 21 hours ahead of HAST

Tarawa · UTC+12

Tuesday, 8 September 2026

Adak · HADT

Monday, 7 September 2026

When are both sides at work?

0003060912151821
TarawaUTC+12 · +12:00
0003060912151821
AdakHADT · -09:00
0306091215182100

Shared working hours: 09:00–15:00 in Tarawa is 12:00–18:00 in Adak.

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

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19:05 Tue 8 Sep Tarawa = 22:05 Mon 7 Sep Adak

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Hour-by-hour conversion

Tarawa (GILT)Adak (HAST)
00:0003:00prev. day
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08:0011:00prev. day
09:0012:00prev. dayBoth at work
10:0013:00prev. dayBoth at work
11:0014:00prev. dayBoth at work
12:0015:00prev. dayBoth at work
13:0016:00prev. dayBoth at work
14:0017:00prev. dayBoth at work
15:0018:00prev. day
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19:0022:00prev. dayNow
20:0023:00prev. day
21:0000:00
22:0001:00
23:0002:00

About this conversion

GILT here means Gilbert Islands Time, represented by Tarawa (Pacific/Tarawa), currently UTC+12. 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 Tarawa; day boundaries are marked where the date differs.

Quick answers

  • 09:00 GILT is 12:00 HAST
  • 12:00 GILT is 15:00 HAST
  • 15:00 GILT is 18:00 HAST
  • 18:00 GILT is 21:00 HAST

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