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Convert Atlantic Time to Indian Ocean Time

AST · UTC−4 → IOT · UTC+6

AST is 10 hours behind IOT

Today Halifax is on ADT (UTC−3) and Chagos on UTC+6 (UTC+6), so right now Halifax is 9 hours behind Chagos.

Halifax · ADT

Wednesday, 7 October 2026

Chagos · UTC+6

Wednesday, 7 October 2026

When are both sides at work?

0003060912151821
HalifaxADT · -03:00
0003060912151821
ChagosUTC+6 · +06:00
0912151821000306

No overlap in standard working hours. Closest workable window: 07:00–14:00 in Halifax, which is 16:00–23:00 in Chagos.

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

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08:24 Wed 7 Oct Halifax = 17:24 Wed 7 Oct Chagos

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Hour-by-hour conversion

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

About this conversion

AST here means Atlantic Time, represented by Halifax (America/Halifax), currently UTC−3. IOT means Indian Ocean Time, represented by Chagos (Indian/Chagos), currently UTC+6.

AST is used by 32 zones, including Canada. If you meant a different one, see every meaning of AST.

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 Halifax; day boundaries are marked where the date differs.

Quick answers

  • 09:00 AST is 18:00 IOT
  • 12:00 AST is 21:00 IOT
  • 15:00 AST is 00:00 IOT
  • 18:00 AST is 03:00 IOT

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