Updating current time…
CHADT
12am
3am
6am
9am
12pm
3pm
6pm
9pm
TOT
12am
3am
6am
9am
12pm
3pm
6pm
9pm

Quick answers

Selected conversion

2:00 am02:00 CHADT (UTC+13:45), Oct 15, 2026 = 1:15 am01:15 TOT (UTC+13), Oct 15, 2026

CHADT is 45 minutes ahead of TOT.

CHADT and TOT examples

These examples always use CHADT (UTC+13:45) and TOT (UTC+13). They stay the same when you change the date or time above. The selected conversion may differ when daylight saving time applies.

CHADT is 45 minutes ahead of TOT.

How the time difference changes

Depending on seasonal clock changes, CHAST is 15 minutes behind TOT or CHADT is 45 minutes ahead of TOT.

Depending on seasonal clock changes, working hours of 9:00 am to 5:00 pm in CHAST correspond to 9:15 am to 5:15 pm in TOT or working hours of 9:00 am to 5:00 pm in CHADT correspond to 8:15 am to 4:15 pm in TOT.Depending on seasonal clock changes, working hours of 09:00 to 17:00 in CHAST correspond to 09:15 to 17:15 in TOT or working hours of 09:00 to 17:00 in CHADT correspond to 08:15 to 16:15 in TOT.

Compare CHADT time with TOT time, including current local time, UTC offsets, time difference, daylight saving changes, working hours, and shareable meeting times.

Time Difference

Chatham Island Daylight Time is 45 minutes ahead of Tonga Time.
2:00 am02:00 in CHADT is 1:15 am01:15 in TOT

CHADT to TOT call time
Best time for a conference call or a meeting is between 9:45am-5pm09:45-17:00 in CHADT which corresponds to 9am-4:15pm09:00-16:15 in TOT

2:00 am02:00 Chatham Island Daylight Time (CHADT). Offset UTC +13:45 hours
1:15 am01:15 Tonga Time (TOT). Offset UTC +13:00 hours

2:00 am02:00 CHADT / 1:15 am01:15 TOT

Choose an hour to update the converter. Day labels such as “next day” or “+1” are relative to the selected date in the first column. Use Up and Down arrow keys, Home or End to move between hours, then Enter or Space to select.

Hourly time comparison
CHADTTOT
11:15pm previous day
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1:15am
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1:15pm
2:15pm
3:15pm
4:15pm
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7:15pm
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10:15pm
23:15 previous day
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Chatham Island Daylight Time

Offset: CHADT is 13 hours and 45 minutes ahead of Greenwich Mean Time (GMT).

Countries using this time zone: New Zealand

Principal Cities: The largest city in the CHADT time zone is Waitangi in New Zealand, with about 140 people.

Map of the areas on Chatham Island Daylight Time (CHADT)
CHADT part of the year

Today all shaded areas are on CHADT.

Daylight Saving: Chatham Island Daylight Time (CHADT) is a daylight saving/summer time zone. During winter, some places set clocks back one hour and observe Chatham Island Standard Time (CHAST).

123456789101112Start: Chatham Island Daylight Time (CHADT) started on Sunday, September 27, 2026 at 2:45 am02:45 local time and clocks were set one hour forward to Sunday, September 27, 2026, 3:45 am03:45. Daylight saving starts annually on the last Sunday of September.

123456789101112End: Chatham Island Daylight Time (CHADT) ends on Sunday, April 4, 2027 at 3:45 am03:45 local time and clocks are set one hour back to Sunday, April 4, 2027, 2:45 am02:45 local standard time instead. Daylight saving ends annually on the first Sunday of April.

See upcoming clock changes worldwide.

CHADT representations, usage and related time zones

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
  • +1345 - basic
  • +13:45 - extended
Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
  • +1345 - sign character (+) followed by a four digit time providing hours (13) and minutes (45) of the offset. Indicates an offset of thirteen hours and forty-five minutes to the east of the zero meridian.

Tonga Time

Offset: TOT is 13 hours ahead of Greenwich Mean Time (GMT).

Countries using this time zone: Tonga

Principal Cities: The largest city in the TOT time zone is Nuku‘alofa in Tonga, with about 22,400 people. Other major cities in this time zone include Mu‘a, Neiafu, Haveluloto, Tofoa-Koloua.

Daylight Saving: Clocks in Tonga Time (TOT) do not change for daylight saving time, so TOT stays the same throughout the year. Other time zones may set clocks forward in summer and back in winter; see upcoming clock changes worldwide.

TOT representations, usage and related time zones

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
  • +13 - basic short
  • +1300 - basic
  • +13:00 - extended
Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
  • +1300 - sign character (+) followed by a four digit time providing hours (13) and minutes (00) of the offset. Indicates an offset of thirteen hours to the east of the zero meridian.
Time zones with the GMT +13 offset:
  • FJST - Fiji Summer Time
  • NZDT - New Zealand Daylight Time
  • PHOT - Phoenix Island Time
  • TKT - Tokelau Time
  • TOT - Tonga Time
  • WST - West Samoa Time
  • WSST - West Samoa Standard Time