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CHAST to WST Pacific Converter

Updating current time…
CHADT/CHAST
Chatham Island Daylight Time
GMT +13:45
12am
3am
6am
9am
12pm
3pm
6pm
9pm
Chatham Island is on daylight saving time: CHADT (UTC+13:45) until Sun, Apr 4, 2027.
Use CHAST all year (UTC+12:45)
WST
West Samoa Time
GMT +13
12am
3am
6am
9am
12pm
3pm
6pm
9pm

Quick answers

Selected conversion

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

CHADT is 45 minutes ahead of WST.

CHAST and WST examples

These examples always use CHAST (UTC+12:45) and WST (UTC+13). They stay the same when you change the date or time above. The selected conversion may differ when daylight saving time applies.

CHAST is 15 minutes behind WST.

How the time difference changes

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

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

Compare CHAST time with WST 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 West Samoa Time.
2:00 am02:00 in CHADT is 1:15 am01:15 in WST

CHADT to WST 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 WST

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

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

CHADTWST
12:00am11:15pm
1:00am12:15am
2:00am1:15am
3:00am2:15am
4:00am3:15am
5:00am4:15am
6:00am5:15am
7:00am6:15am
8:00am7:15am
9:00am8:15am
10:00am9:15am
11:00am10:15am
12:00pm11:15am
1:00pm12:15pm
2:00pm1:15pm
3:00pm2:15pm
4:00pm3:15pm
5:00pm4:15pm
6:00pm5:15pm
7:00pm6:15pm
8:00pm7:15pm
9:00pm8:15pm
10:00pm9:15pm
11:00pm10:15pm
00:0023:15
01:0000:15
02:0001:15
03:0002:15
04:0003:15
05:0004:15
06:0005:15
07:0006:15
08:0007:15
09:0008:15
10:0009:15
11:0010:15
12:0011:15
13:0012:15
14:0013:15
15:0014:15
16:0015:15
17:0016:15
18:0017:15
19:0018:15
20:0019:15
21:0020:15
22:0021:15
23:0022:15

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).

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

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

See upcoming clock changes worldwide.

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.

West Samoa Time

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

Countries using this time zone: Samoa (western)

Principal Cities: The largest city in the WST time zone is Apia in Samoa, with about 40,407 people.

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

WST 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.
WST Abbreviation: Several time zones share WST abbreviation and it could refer to these time zones
  • Western Sahara Summer Time - UTC +1
  • West Samoa Time - UTC +13
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
EST to ISTGMT to ESTPST to ESTEST to GMTPST to GMT