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Convert Chatham Time to Tonga Time

CHAST · UTC+12:45 → TOT · UTC+13

CHAST is 15 minutes behind TOT

Today Chatham is on CHADT (UTC+13:45) and Nuku‘alofa on UTC+13 (UTC+13), so right now Chatham is 45 minutes ahead of Nuku‘alofa.

Chatham · CHADT

Thursday, 8 October 2026

Nuku‘alofa · UTC+13

Thursday, 8 October 2026

When are both sides at work?

0003060912151821
ChathamCHADT · +13:45
0003060912151821
Nuku‘alofaUTC+13 · +13:00
2302050811141720

Shared working hours: 10:00–18:00 in Chatham is 09:15–17:15 in Nuku‘alofa.

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

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01:11 Thu 8 Oct Chatham = 00:26 Thu 8 Oct Nuku‘alofa

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Hour-by-hour conversion

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

About this conversion

CHAST here means Chatham Time, represented by Chatham (Pacific/Chatham), currently UTC+13:45. TOT means Tonga Time, represented by Nuku‘alofa (Pacific/Tongatapu), currently UTC+13.

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 Chatham; day boundaries are marked where the date differs.

Quick answers

  • 09:00 CHAST is 08:15 TOT
  • 12:00 CHAST is 11:15 TOT
  • 15:00 CHAST is 14:15 TOT
  • 18:00 CHAST is 17:15 TOT

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