CHAST — Chatham Island Standard Time

See what CHAST means, where it is used, its UTC+12:45 offset, and how to compare or convert it with other time zones.

UTC
UTC · UTC
Coordinated Universal TimeGMT +00Sat, Apr 11
12AM3AM6AM9AM12PM3PM6PM9PM
UTC
Coordinated Universal TimeGMT +00Sat, Apr 11
12AM3AM6AM9AM12PM3PM6PM9PM
globe

Meaning and Usage Areas

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.

sun

DST Status and Relationship

This page shows that CHAST itself is standard time and not daylight saving time. When daylight saving applies in the Chatham Islands, the region switches to Chatham Island Daylight Time instead.

calendar

Convert CHAST Across Zones

Compare CHAST with other time zones using the visual time grid and hour-by-hour tables. Export schedules with ICS download or send to Google Calendar and Gmail.

How to Convert CHAST to Other Time Zones

  1. Open the CHAST converter page: Visit https://www.xconvert.com/time-converter/chast-time-zone to load the comparison grid with CHAST pre-loaded as the reference row. This view is useful when you need to line up work hours, evening availability, or overnight coverage against Chatham Island Standard Time, which runs at UTC+12.

  2. Add comparison cities: Click + Add City and search for the cities or time zones you want to compare against CHAST. This is helpful for practical scheduling such as arranging a supplier call, coordinating a remote support shift, or checking whether a CHAST daytime window overlaps with another team’s business hours.

  3. Select a time range on the grid: Click Select to enter selection mode, then drag across the CHAST row to highlight a time block in purple; use the left and right handles to fine-tune the range or drag the center to move it. Because the tool is visual, you can immediately see whether a CHAST morning, afternoon, or evening slot lands inside green work-hour blocks or gray night-time blocks for the other rows you added.

  4. Export or share the result: Once a time range is selected, use the export options for ICS download, Google Calendar, Gmail, Copy to clipboard, or Share link. This makes it easy to send a confirmed meeting window to clients, travel contacts, or distributed teams so everyone receives the same time block in their own local context.

About Chatham Island Standard Time (CHAST)

CHAST stands for Chatham Island Standard Time. Its standard offset is UTC+12, which means local time in CHAST is 12 hours ahead of Coordinated Universal Time.

Chatham Island Standard Time does not observe daylight saving time and has no counterpart. That means there is no seasonal switch to a separate daylight abbreviation, and the time zone remains identified as CHAST rather than alternating between standard and summer forms.

This consistency is useful for recurring planning because the base time zone name does not change during the year. When you compare CHAST with other regions in the converter, the CHAST row stays on the same standard designation of UTC+12.

CHAST and Daylight Saving Time

CHAST does not observe DST and has no counterpart. There is no daylight saving transition during the year, so CHAST does not switch forward or backward at any point.

Because there is no DST system attached to CHAST, there are no start dates, end dates, or clock-change dates to track for the current year. For scheduling, this means CHAST remains on UTC+12 throughout the year without changing to another abbreviation.

This is especially helpful for long-running calendars, recurring vendor calls, and fixed operational windows. If another region changes its clocks seasonally, the difference between that region and CHAST may shift, but CHAST itself remains unchanged.

Frequently Asked Questions

What does CHAST stand for?

CHAST stands for Chatham Island Standard Time. It is the standard time-zone abbreviation used for this time zone and is fixed at UTC+12.

Because the abbreviation does not rotate into a daylight-saving counterpart, CHAST remains the relevant label year-round. That makes it straightforward to recognize in scheduling tools, meeting invites, and time comparison grids.

Is CHAST the same as GMT?

No. CHAST is UTC+12, while GMT refers to the zero-offset baseline used at UTC+0.

That means CHAST is 12 hours ahead of GMT. If you are comparing meeting times or deadlines, a schedule built in GMT will appear half a day earlier than the same clock time in CHAST.

Which cities use CHAST?

There are no principal cities listed here for CHAST. The key point for conversion purposes is that CHAST refers to Chatham Island Standard Time and uses a fixed offset of UTC+12.

When using the converter, you can still compare CHAST directly against cities you add to the grid. This is often the easiest way to understand overlap for business hours, evening calls, or overnight handoffs.

What is the UTC offset for CHAST?

The UTC offset for CHAST is UTC+12. In practical terms, local time in CHAST is always 12 hours ahead of Coordinated Universal Time.

This fixed offset is useful for recurring scheduling because the baseline does not change during the year. If you are coordinating with teams in other regions, you only need to account for whether those other locations observe seasonal clock changes.

When does CHAST change?

CHAST does not change during the year. It does not observe daylight saving time, and it has no counterpart that replaces it seasonally.

As a result, there are no annual spring or autumn transition dates to remember. This makes CHAST easier to manage in recurring schedules because the time zone itself stays at UTC+12 all year.

Does CHAST have a daylight saving version?

No. CHAST does not observe DST and has no counterpart.

Some time zones switch between a standard abbreviation and a daylight abbreviation, but CHAST does not. For users scheduling across multiple regions, this means CHAST stays stable even when other places move their clocks forward or backward.

How do I convert CHAST to another time zone accurately?

The most reliable method is to use the visual comparison grid on the CHAST converter page. Add the other city or time zone, then drag a purple selection across the CHAST row to see exactly where that same period lands for the comparison row.

This approach is especially practical for real scheduling tasks such as booking a call, planning a support window, or sharing a meeting invite. Since CHAST remains on UTC+12 year-round, the main variable to watch is whether the other location changes due to daylight saving time.