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CHAST to UTC Converter

Updating current time…
CHAST
Chatham Island Standard Time
GMT +12:45
12am
3am
6am
9am
12pm
3pm
6pm
9pm
UTC
Universal Time Coordinated
GMT +0
yesterday
12am
3am
6am
9am
12pm
3pm
6pm
9pm

Quick answers

Selected conversion

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

CHAST and UTC examples

These examples always use CHAST (UTC+12:45) and UTC (UTC+0). They stay the same when you change the date or time above. The selected conversion may differ when daylight saving time applies.

CHAST is 12 hours and 45 minutes ahead of UTC.

How the time difference changes

Depending on seasonal clock changes, CHAST is 12 hours and 45 minutes ahead of UTC or CHADT is 13 hours and 45 minutes ahead of UTC.

Depending on seasonal clock changes, working hours of 9:00 am to 5:00 pm in CHAST correspond to 8:15 pm (previous day) to 4:15 am in UTC or working hours of 9:00 am to 5:00 pm in CHADT correspond to 7:15 pm (previous day) to 3:15 am in UTC.

Compare CHAST time with UTC 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 12 hours and 45 minutes ahead of Universal Time Coordinated
8:00 am08:00 in CHAST is 7:15 pm19:15 in UTC

CHAST to UTC call time
Best time for a conference call or a meeting is between 7am-8am in CHAST which corresponds to 6:15pm-7:15pm in UTC (previous day)

8:00 am08:00 Chatham Island Standard Time (CHAST). Offset UTC +12:45 hours
7:15 pm19:15 Universal Time Coordinated (UTC). Offset UTC 0:00 hours

8:00 am08:00 CHAST / 7:15 pm19:15 UTC

CHASTUTC
12am (midnight)11:15 am
1am12:15 pm
2am1:15 pm
3am2:15 pm
4am3:15 pm
5am4:15 pm
6am5:15 pm
7am6:15 pm
8am7:15 pm
9am8:15 pm
10am9:15 pm
11am10:15 pm
12pm (noon)11:15 pm
1pm12:15 am
2pm1:15 am
3pm2:15 am
4pm3:15 am
5pm4:15 am
6pm5:15 am
7pm6:15 am
8pm7:15 am
9pm8:15 am
10pm9:15 am
11pm10:15 am
00:0011:15
01:0012:15
02:0013:15
03:0014:15
04:0015:15
05:0016:15
06:0017:15
07:0018:15
08:0019:15
09:0020:15
10:0021:15
11:0022:15
12:0023:15
13:0000:15
14:0001:15
15:0002:15
16:0003:15
17:0004:15
18:0005:15
19:0006:15
20:0007:15
21:0008:15
22:0009:15
23:0010:15

Chatham Island Standard Time

Offset: CHAST is 12 hours and 45 minutes ahead Greenwich Mean Time (GMT) and is used in Pacific

Countries using this time zone: New Zealand

CHAST Time Zone Geo Map
CHAST 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 Chatham Island Daylight Time (CHADT).

Start: Chatham Island Standard Time (CHAST) started 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. Standard time starts annually on the first Sunday of April.

End: Chatham Island Standard Time (CHAST) ends 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 local daylight time instead. Standard time ends annually on the last Sunday of September.

CHAST representations, usage and related time zones

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
  • +1245 - basic
  • +12:45 - extended
Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
  • +1245 - sign character (+) followed by a four digit time providing hours (12) and minutes (45) of the offset. Indicates an offset of twelve hours and forty-five minutes to the east of the zero meridian.

Universal Time Coordinated

Offset: UTC is 0 hours ahead Greenwich Mean Time (GMT) and is used in Universal

Coordinated Universal Time (UTC) is the world time standard that regulates clocks and time. It is successor to Greenwich Mean Time (GMT). For casual use, UTC is the same as GMT, but is used by the scientific community.
UTC is the time standard commonly used across the world since 1972. It is used in many technical fields, like aviation industry and meteorologists, also used to synchronize time across internet networks.

UTC representations, usage and related time zones

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
  • Z - is the zone designator for the zero UTC/GMT offset, also known as 'Zulu' time
  • +00 - basic short
  • +0000 - basic
  • +00:00 - extended
Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
  • +0000 - sign character (+) followed by a four digit time providing hours (00) and minutes (00) of the offset. Indicates the zero UTC/GMT offset.
Military/NATO: Used by the U.S. military, Chinese military and others
  • Zulu - Military abbreviation for UTC
  • Z - short form of 'Zulu'
IANA/Olson: Reflects UTC time zone boundaries defined by political bodies, primarily intended for use with computer programs and operating systems
  • Etc/UCT
  • Etc/UTC
  • Etc/Universal
  • Etc/Zulu
  • UCT
  • UTC
  • Universal
  • Zulu
Time zones with the GMT +0 offset:
  • EGST - Eastern Greenland Summer Time
  • GMT - Greenwich Mean Time
  • WET - Western European Time
  • AZOST - Azores Summer Time
  • UTC - Universal Time Coordinated
  • WT - Western Sahara Standard Time
  • Z - Zulu Time Zone
EST to ISTGMT to ESTPST to ESTEST to GMTPST to GMT