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Convert Hawaii-Aleutian Time to Réunion Time

HAST · UTC−9 → RET · UTC+4

HAST is 13 hours behind RET

Adak · HADT

Monday, 7 September 2026

Saint-Denis · UTC+4

Tuesday, 8 September 2026

When are both sides at work?

0003060912151821
AdakHADT · -09:00
0003060912151821
Saint-DenisUTC+4 · +04:00
1316192201040710

No overlap in standard working hours. Closest workable window: 20:00–23:00 in Adak, which is 09:00–12:00 in Saint-Denis.

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

Pick a time and share it

22:06 Mon 7 Sep Adak = 11:06 Tue 8 Sep Saint-Denis

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Hour-by-hour conversion

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

About this conversion

HAST here means Hawaii-Aleutian Time, represented by Adak (America/Adak), currently UTC−9. RET means Réunion Time, represented by Saint-Denis (Indian/Reunion), currently UTC+4.

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 22:00 RET
  • 12:00 HAST is 01:00 RET
  • 15:00 HAST is 04:00 RET
  • 18:00 HAST is 07:00 RET

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