CHAST to WSST Converter
Chatham Island is on daylight saving time: CHADT (UTC+13:45) until Sun, Apr 4, 2027.
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Add one or more places to compare local times, adjust the date, and share the result.
Quick answers
Selected conversion
2:00 am02:00 CHADT (UTC+13:45), Nov 1, 2026 = 1:15 am01:15 WSST (UTC+13), Nov 1, 2026
CHADT is 45 minutes ahead of WSST.
CHAST and WSST examples
These examples always use CHAST (UTC+12:45) and WSST (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 WSST.
How the time difference changes
Depending on seasonal clock changes, CHAST is 15 minutes behind WSST or CHADT is 45 minutes ahead of WSST.
Depending on seasonal clock changes, working hours of 9:00 am to 6:00 pm in CHAST correspond to 9:15 am to 6:15 pm in WSST or working hours of 9:00 am to 6:00 pm in CHADT correspond to 8:15 am to 5:15 pm in WSST.Depending on seasonal clock changes, working hours of 09:00 to 18:00 in CHAST correspond to 09:15 to 18:15 in WSST or working hours of 09:00 to 18:00 in CHADT correspond to 08:15 to 17:15 in WSST.
Compare CHAST time with WSST 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 Standard Time.
2:00 am02:00 in CHADT is 1:15 am01:15 in WSST
CHADT to WSST call time
Best time for a conference call or a meeting is between 9:45am-6pm09:45-18:00 in CHADT which corresponds to 9am-5:15pm09:00-17:15 in WSST
2:00 am02:00 Chatham Island Daylight Time (CHADT). Offset UTC +13:45 hours
1:15 am01:15 West Samoa Standard Time (WSST). Offset UTC +13:00 hours
2:00 am02:00 CHADT / 1:15 am01:15 WSST
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.
| CHADT | WSST |
|---|---|
| 11:15pm previous day | |
| 12:15am | |
| 1:15am | |
| 2:15am | |
| 3:15am | |
| 4:15am | |
| 5:15am | |
| 6:15am | |
| 7:15am | |
| 8:15am | |
| 9:15am | |
| 10:15am | |
| 11:15am | |
| 12:15pm | |
| 1:15pm | |
| 2:15pm | |
| 3:15pm | |
| 4:15pm | |
| 5:15pm | |
| 6:15pm | |
| 7:15pm | |
| 8:15pm | |
| 9:15pm | |
| 10:15pm | |
| 23:15 previous day | |
| 00:15 | |
| 01:15 | |
| 02:15 | |
| 03:15 | |
| 04:15 | |
| 05:15 | |
| 06:15 | |
| 07:15 | |
| 08:15 | |
| 09:15 | |
| 10:15 | |
| 11:15 | |
| 12:15 | |
| 13:15 | |
| 14:15 | |
| 15:15 | |
| 16:15 | |
| 17:15 | |
| 18:15 | |
| 19:15 | |
| 20:15 | |
| 21:15 | |
| 22:15 |
Chatham Island Standard Time
Offset: CHAST is 12 hours and 45 minutes ahead of Greenwich Mean Time (GMT).
Countries using this time zone: New Zealand
Principal Cities: The largest city in the CHAST time zone is Waitangi in New Zealand, with about 140 people.
Today the shaded areas are on UTC+13:45.
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 New Zealand daylight saving time and upcoming clock changes worldwide.
CHAST representations, usage and related time zones
- +1245 - basic
- +12:45 - extended
- +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 Standard Time
Offset: WSST is 13 hours ahead of Greenwich Mean Time (GMT).
Countries using this time zone: Samoa
Principal Cities: The largest city in the WSST time zone is Apia in Samoa, with about 40,407 people. Other major cities in this time zone include Palauli, Asau, Mulifanua, Sale’imoa.
Daylight Saving: Clocks in West Samoa Standard Time (WSST) do not change for daylight saving time, so WSST stays the same throughout the year. Other time zones may set clocks forward in summer and back in winter; see upcoming clock changes worldwide.
WSST representations, usage and related time zones
- +13 - basic short
- +1300 - basic
- +13:00 - extended
- +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.
- 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