CHAST — Chatham Island Standard Time
See what CHAST means, where it is used, and how to compare or convert Chatham Islands time with other time zones.
Meaning and places used
CHAST stands for Chatham Island Standard Time and uses a UTC+12:45 offset. It is used in New Zealand’s Chatham Islands, one of the world’s uncommon 45-minute time zones.
DST status and relationship
This page shows that CHAST itself is standard time and DST is not active here now. When daylight saving applies in the region, the related summer time is CHADT rather than CHAST.
Convert to other zones
Compare CHAST with other time zones using the visual time grid and hour-by-hour tables. Export meetings with ICS download or add them to Google Calendar and Gmail.
How to Convert CHAST to Other Time Zones
Open the CHAST converter page: Go to https://www.xconvert.com/time-converter/chast-time-zone to open the visual comparison grid with Chatham Island Standard Time (CHAST) already loaded. This view is useful when you need to line up work hours across regions, such as scheduling a call with a remote team or checking whether a support handoff overlaps with your local business day.
Add comparison cities or time zones: Click + Add City and search for the locations you want to compare against CHAST. This is especially helpful for practical coordination tasks like comparing CHAST with your headquarters, a client’s office, or a supplier’s operating hours so you can quickly see whether the overlap falls in green work-hour blocks or in evening and night slots.
Select a time range on the grid: Click Select if needed, then drag across the CHAST row to highlight a meeting window in purple. You can drag the left or right handles to resize the range, or drag the center to move it, which makes it easy to test different options for a project update, travel call, or cross-border customer meeting without typing times manually.
Export and share the result: Once a range is selected, use the export options for ICS download, Google Calendar, Gmail, Copy to clipboard, or Share link. These options are practical for sending a confirmed meeting window to distributed teams, adding the slot to a calendar invite, or sharing a link with colleagues so everyone sees the same CHAST-based comparison instantly.
About Chatham Island Standard Time (CHAST)
CHAST stands for Chatham Island Standard Time. Its exact offset is UTC+12:45, which makes it one of the uncommon time standards that uses a 45-minute offset rather than a whole hour.
Chatham Island Standard Time does not observe daylight saving time and has no counterpart. That means CHAST remains identified as CHAST rather than switching between standard and daylight abbreviations.
CHAST and Daylight Saving Time
CHAST does not observe DST. It does not switch to a daylight time abbreviation, and there are no daylight saving transition dates to track during the year.
This matters for scheduling because CHAST stays on UTC+12:45 year-round. If you are coordinating recurring meetings, payroll cutoffs, or operational deadlines, you do not need to account for seasonal clock changes within CHAST itself.
Frequently Asked Questions
What does CHAST stand for?
CHAST stands for Chatham Island Standard Time. It is the standard time abbreviation used for this time zone and is identified by the fixed offset UTC+12:45.
Is CHAST the same as GMT?
No, CHAST is not the same as GMT. CHAST is UTC+12:45, while GMT is based on UTC+0:00, so CHAST is offset far ahead of Greenwich Mean Time and uses a distinctive 45-minute difference rather than a whole-hour alignment.
Which cities use CHAST?
There are no principal cities listed here for CHAST. The time zone name itself is Chatham Island Standard Time, and the key practical detail for conversion is its fixed offset of UTC+12:45.
What is the UTC offset for CHAST?
The UTC offset for CHAST is UTC+12:45. This means it is 12 hours and 45 minutes ahead of Coordinated Universal Time, which is important to note because many time zones use whole-hour offsets instead.
When does CHAST change for daylight saving time?
CHAST does not change for daylight saving time. It has no DST counterpart, so there are no annual switch dates, no seasonal clock adjustments, and no alternate daylight abbreviation to monitor.
Does CHAST have a daylight saving counterpart?
No, CHAST has no counterpart. Unlike time zones that alternate between standard time and daylight time, CHAST remains CHAST and keeps the same UTC+12:45 offset.
Why is CHAST important to verify before scheduling meetings?
CHAST is important to verify because its UTC+12:45 offset is unusual and easy to misread if you assume all time zones follow full-hour patterns. For business calls, remote team planning, and calendar invitations, confirming the 45-minute offset helps prevent scheduling mistakes that can shift a meeting by nearly an hour.