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Convert Atlantic Time to Korean Time

AST · UTC−4 → KST · UTC+9

AST is 13 hours behind KST

Today Halifax is on ADT (UTC−3) and Seoul on UTC+9 (UTC+9), so right now Halifax is 12 hours behind Seoul.

Halifax · ADT

Wednesday, 7 October 2026

Seoul · UTC+9

Wednesday, 7 October 2026

When are both sides at work?

0003060912151821
HalifaxADT · -03:00
0003060912151821
SeoulUTC+9 · +09:00
1215182100030609

No overlap in standard working hours. Closest workable window: 09:00–11:00 in Halifax, which is 21:00–23:00 in Seoul.

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

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08:24 Wed 7 Oct Halifax = 20:24 Wed 7 Oct Seoul

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Hour-by-hour conversion

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

About this conversion

AST here means Atlantic Time, represented by Halifax (America/Halifax), currently UTC−3. KST means Korean Time, represented by Seoul (Asia/Seoul), currently UTC+9.

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

KST is used by 2 zones, including South Korea. See every meaning of KST.

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 21:00 KST
  • 12:00 AST is 00:00 KST
  • 15:00 AST is 03:00 KST
  • 18:00 AST is 06:00 KST

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