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Convert Casey Time to French Guiana Time

CAST · UTC+8 → GFT · UTC−3

CAST is 11 hours ahead of GFT

Casey · AWST

Wednesday, 7 October 2026

Cayenne · UTC-3

Wednesday, 7 October 2026

When are both sides at work?

0003060912151821
CaseyAWST · +08:00
0003060912151821
CayenneUTC-3 · -03:00
1316192201040710

No overlap in standard working hours. Closest workable window: 20:00–23:00 in Casey, which is 09:00–12:00 in Cayenne.

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

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19:26 Wed 7 Oct Casey = 08:26 Wed 7 Oct Cayenne

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Hour-by-hour conversion

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

About this conversion

CAST here means Casey Time, represented by Casey (Antarctica/Casey), currently UTC+8. GFT means French Guiana Time, represented by Cayenne (America/Cayenne), currently UTC−3.

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 Casey; day boundaries are marked where the date differs.

Quick answers

  • 09:00 CAST is 22:00 GFT
  • 12:00 CAST is 01:00 GFT
  • 15:00 CAST is 04:00 GFT
  • 18:00 CAST is 07:00 GFT

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