CHAST to WSDT Converter
CHAST is not used on September 27, 2026
This converter uses CHADT for Chatham Island.
WSDT is not used on this date
This converter uses WST (GMT +13), the offset Apia uses on this date. Open the WST converter.Quick answers
Selected conversion
The selected date and time will appear here when the converter loads.
CHAST and WSDT examples
These examples always use CHAST (UTC+12:45) and WSDT (UTC+14). They stay the same when you change the date or time above. The selected conversion may differ when daylight saving time applies.
CHAST is 1 hour and 15 minutes behind WSDT.
How the time difference changes
Depending on seasonal clock changes, CHAST is 15 minutes behind WST or CHADT is 45 minutes ahead of WST.
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 or working hours of 9:00 am to 5:00 pm in CHADT correspond to 8:15 am to 4:15 pm in WST.
Compare CHAST time with WSDT 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 0 hours and 45 minutes ahead of West Samoa Time
1:00 am01:00 in CHADT is 12:15 am00:15 in WST
CHADT to WST call time
Best time for a conference call or a meeting is between 9:45am-5pm in CHADT which corresponds to 9am-4:15pm in WST
1:00 am01:00 Chatham Island Daylight Time (CHADT). Offset UTC +13:45 hours
12:15 am00:15 West Samoa Time (WST). Offset UTC +13:00 hours
1:00 am01:00 CHADT / 12:15 am00:15 WST
| CHADT | WST |
|---|---|
| 12am (midnight) | 11:15 pm |
| 1am | 12:15 am |
| 2am | 1:15 am |
| 3am | 2:15 am |
| 4am | 3:15 am |
| 5am | 4:15 am |
| 6am | 5:15 am |
| 7am | 6:15 am |
| 8am | 7:15 am |
| 9am | 8:15 am |
| 10am | 9:15 am |
| 11am | 10:15 am |
| 12pm (noon) | 11:15 am |
| 1pm | 12:15 pm |
| 2pm | 1:15 pm |
| 3pm | 2:15 pm |
| 4pm | 3:15 pm |
| 5pm | 4:15 pm |
| 6pm | 5:15 pm |
| 7pm | 6:15 pm |
| 8pm | 7:15 pm |
| 9pm | 8:15 pm |
| 10pm | 9:15 pm |
| 11pm | 10:15 pm |
| 00:00 | 23:15 |
| 01:00 | 00:15 |
| 02:00 | 01:15 |
| 03:00 | 02:15 |
| 04:00 | 03:15 |
| 05:00 | 04:15 |
| 06:00 | 05:15 |
| 07:00 | 06:15 |
| 08:00 | 07:15 |
| 09:00 | 08:15 |
| 10:00 | 09:15 |
| 11:00 | 10:15 |
| 12:00 | 11:15 |
| 13:00 | 12:15 |
| 14:00 | 13:15 |
| 15:00 | 14:15 |
| 16:00 | 15:15 |
| 17:00 | 16:15 |
| 18:00 | 17:15 |
| 19:00 | 18:15 |
| 20:00 | 19:15 |
| 21:00 | 20:15 |
| 22:00 | 21:15 |
| 23:00 | 22:15 |
Chatham Island Standard Time
Offset: CHAST is 12 hours and 45 minutes ahead Greenwich Mean Time (GMT) and is used in Pacific
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 am local time and clocks were 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.
Start: Chatham Island Standard Time (CHAST) starts on Sunday, April 4, 2027 at 3:45 am local time and clocks are set one hour back to Sunday, April 4, 2027, 2:45 am. Standard time starts annually on the first Sunday of April.
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 Daylight Time
Offset: WSDT is 14 hours ahead Greenwich Mean Time (GMT) and is used in Pacific
WSDT representations, usage and related time zones
- +14 - basic short
- +1400 - basic
- +14:00 - extended
- +1400 - sign character (+) followed by a four digit time providing hours (14) and minutes (00) of the offset. Indicates an offset of fourteen hours to the east of the zero meridian.
- LINT - Line Islands Time
- WSDT - West Samoa Daylight Time