WST Pacific to CHAST
Quick answers
WST is 15 minutes ahead of CHAST. WST uses GMT +13, and CHAST uses GMT +12:45 for this comparison.
For example, 9:30 pm WST is 9:15 pm CHAST. Use the converter above to adjust the date or time and create a shareable meeting link.
Best meeting overlap: 9:15am-5pm WST, which is 9am-4:45pm CHAST.
Compare WST time with CHAST time, including current local time, UTC offsets, time difference, daylight saving changes, working hours, and shareable meeting times.
Time Difference
West Samoa Time is 0 hours and 15 minutes ahead of Chatham Island Standard Time
9:30 pm21:30 in WST is 9:15 pm21:15 in CHAST
WST to CHAST call time
Best time for a conference call or a meeting is between 9:15am-5pm in WST which corresponds to 9am-4:45pm in CHAST
9:30 pm21:30 West Samoa Time (WST). Offset UTC +13:00 hours
9:15 pm21:15 Chatham Island Standard Time (CHAST). Offset UTC +12:45 hours
9:30 pm21:30 WST / 9:15 pm21:15 CHAST
| WST | CHAST |
|---|---|
| 12am (midnight) | 11:45 pm |
| 1am | 12:45 am |
| 2am | 1:45 am |
| 3am | 2:45 am |
| 4am | 3:45 am |
| 5am | 4:45 am |
| 6am | 5:45 am |
| 7am | 6:45 am |
| 8am | 7:45 am |
| 9am | 8:45 am |
| 10am | 9:45 am |
| 11am | 10:45 am |
| 12pm (noon) | 11:45 am |
| 1pm | 12:45 pm |
| 2pm | 1:45 pm |
| 3pm | 2:45 pm |
| 4pm | 3:45 pm |
| 5pm | 4:45 pm |
| 6pm | 5:45 pm |
| 7pm | 6:45 pm |
| 8pm | 7:45 pm |
| 9pm | 8:45 pm |
| 10pm | 9:45 pm |
| 11pm | 10:45 pm |
| 00:00 | 23:45 |
| 01:00 | 00:45 |
| 02:00 | 01:45 |
| 03:00 | 02:45 |
| 04:00 | 03:45 |
| 05:00 | 04:45 |
| 06:00 | 05:45 |
| 07:00 | 06:45 |
| 08:00 | 07:45 |
| 09:00 | 08:45 |
| 10:00 | 09:45 |
| 11:00 | 10:45 |
| 12:00 | 11:45 |
| 13:00 | 12:45 |
| 14:00 | 13:45 |
| 15:00 | 14:45 |
| 16:00 | 15:45 |
| 17:00 | 16:45 |
| 18:00 | 17:45 |
| 19:00 | 18:45 |
| 20:00 | 19:45 |
| 21:00 | 20:45 |
| 22:00 | 21:45 |
| 23:00 | 22:45 |
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.
WST 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.
- Western Sahara Summer Time - UTC +1
- West Samoa Time - UTC +13
- 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
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
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
- +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.