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CHAST/CHADT
Chatham Island Standard Time
GMT +12:45
12am
3am
6am
9am
12pm
3pm
6pm
9pm
CHADT is not used on September 20, 2026

This converter uses CHAST for Chatham Island.

CEST/CET
Central European Summer Time
GMT +2
yesterday
12am
3am
6am
9am
12pm
3pm
6pm
9pm
CET is not used on this date
This converter uses CEST (GMT +2), the offset Berlin uses on this date. Open the CEST converter.

Quick answers

Selected conversion

The selected date and time will appear here when the converter loads.

CHADT and CET examples

These examples always use CHADT (UTC+13:45) and CET (UTC+1). They stay the same when you change the date or time above. The selected conversion may differ when daylight saving time applies.

CHADT is 12 hours and 45 minutes ahead of CET.

How the time difference changes

Depending on seasonal clock changes, CHAST is 10 hours and 45 minutes ahead of CEST, CHADT is 11 hours and 45 minutes ahead of CEST, or CHADT is 12 hours and 45 minutes ahead of CET.

Depending on seasonal clock changes, working hours of 9:00 am to 5:00 pm in CHAST correspond to 10:15 pm (previous day) to 6:15 am in CEST, working hours of 9:00 am to 5:00 pm in CHADT correspond to 9:15 pm (previous day) to 5:15 am in CEST, or working hours of 9:00 am to 5:00 pm in CHADT correspond to 8:15 pm (previous day) to 4:15 am in CET.

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

Time Difference

Chatham Island Standard Time is 10 hours and 45 minutes ahead of Central European Summer Time
9:30 am09:30 in CHAST is 10:45 pm22:45 in CEST

CHAST to CEST call time
Best time for a conference call or a meeting is between 5:45pm-6:45pm in CHAST which corresponds to 7am-8am in CEST

9:30 am09:30 Chatham Island Standard Time (CHAST). Offset UTC +12:45 hours
10:45 pm22:45 Central European Summer Time (CEST). Offset UTC +2:00 hours

9:30 am09:30 CHAST / 10:45 pm22:45 CEST

CHASTCEST
12am (midnight)1:15 pm
1am2:15 pm
2am3:15 pm
3am4:15 pm
4am5:15 pm
5am6:15 pm
6am7:15 pm
7am8:15 pm
8am9:15 pm
9am10:15 pm
10am11:15 pm
11am12:15 am
12pm (noon)1:15 am
1pm2:15 am
2pm3:15 am
3pm4:15 am
4pm5:15 am
5pm6:15 am
6pm7:15 am
7pm8:15 am
8pm9:15 am
9pm10:15 am
10pm11:15 am
11pm12:15 pm
00:0013:15
01:0014:15
02:0015:15
03:0016:15
04:0017:15
05:0018:15
06:0019:15
07:0020:15
08:0021:15
09:0022:15
10:0023:15
11:0000:15
12:0001:15
13:0002:15
14:0003:15
15:0004:15
16:0005:15
17:0006:15
18:0007:15
19:0008:15
20:0009:15
21:0010:15
22:0011:15
23:0012:15

Chatham Island Daylight Time

Offset: CHADT is 13 hours and 45 minutes ahead Greenwich Mean Time (GMT) and is used in Pacific

CHADT Time Zone Geo Map
CHADT timezone map

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

End: Chatham Island Daylight Time (CHADT) ended on Sunday, April 5, 2026 at 3:45 am local time and clocks were set one hour back to Sunday, April 5, 2026, 2:45 am local standard time instead. Daylight saving ends annually on the first Sunday of April

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

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.

Central European Time

Offset: CET is 1 hour ahead Greenwich Mean Time (GMT) and is used in Europe

Countries using this time zone: Algeria, Tunisia

Principal Cities: The largest city in the CET time zone is Algiers in Algeria, with about 2.364 million people. Other major cities in this time zone include Oran, Tunis, Constantine, Sfax.

German: MEZ - Mitteleuropäische Zeit

CET Time Zone Geo Map
CET timezone map

Daylight Saving: This is a standard time zone. During summer, some places set clocks forward one hour for daylight saving time and observe Central European Summer Time (CEST).

Daylight saving time clock moves forward for one hour from 2am to 3amEnd: Central European Time (CET) ended on Sunday, March 29, 2026 at 2:00 am local time and clocks were set one hour forward to Sunday, March 29, 2026, 3:00 am local daylight time instead. Standard time ends annually on the last Sunday of March.

Daylight saving time clock moves back for one hour from 3am to 2amStart: Central European Time (CET) starts on Sunday, October 25, 2026 at 3:00 am local time and clocks are set one hour back to Sunday, October 25, 2026, 2:00 am. Standard time starts annually on the last Sunday of October.

CET representations, usage and related time zones

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
  • +01 - basic short
  • +0100 - basic
  • +01:00 - extended
Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
  • +0100 - sign character (+) followed by a four digit time providing hours (01) and minutes (00) of the offset. Indicates an offset of one hour to the east of the zero meridian.
Military/NATO: Used by the U.S. military, Chinese military and others
  • Alpha - Military abbreviation for CET
  • A - short form of 'Alpha'
IANA/Olson: Reflects CET time zone boundaries defined by political bodies, primarily intended for use with computer programs and operating systems
  • Africa/Algiers
  • Africa/Ceuta
  • Africa/Tunis
  • Arctic/Longyearbyen
  • Atlantic/Jan_Mayen
  • CET
  • Europe/Amsterdam
  • Europe/Andorra
  • Europe/Belgrade
  • Europe/Berlin
  • Europe/Bratislava
  • Europe/Brussels
  • Europe/Budapest
  • Europe/Busingen
  • Europe/Copenhagen
  • Europe/Gibraltar
  • Europe/Ljubljana
  • Europe/Luxembourg
  • Europe/Madrid
  • Europe/Malta
  • Europe/Monaco
  • Europe/Oslo
  • Europe/Paris
  • Europe/Podgorica
  • Europe/Prague
  • Europe/Rome
  • Europe/San_Marino
  • Europe/Sarajevo
  • Europe/Skopje
  • Europe/Stockholm
  • Europe/Tirane
  • Europe/Vaduz
  • Europe/Vatican
  • Europe/Vienna
  • Europe/Warsaw
  • Europe/Zagreb
  • Europe/Zurich
  • MET
  • Poland
Time zones with the GMT +1 offset:
  • BST - British Summer Time
  • CET - Central European Time
  • IST - Irish Standard Time
  • WEST - Western European Summer Time
  • A - Alpha Time Zone
  • CET - Central European Time
  • MEZ - Mitteleuropäische Zeit
  • WAT - West Africa Time
  • WST - Western Sahara Summer Time
  • BMT - Biel Mean Time