TOT — Tonga Time
See what TOT means, where it is used, the current UTC+13 offset, and how to compare or convert it with other time zones.
Meaning and usage
TOT stands for Tonga Time and uses a fixed UTC+13 offset. It is used in Tonga as the standard local time year-round.
No daylight saving
Tonga Time does not currently observe DST, so TOT stays at UTC+13 throughout the year. This page tracks rule changes automatically using the IANA timezone database.
Convert TOT easily
Compare TOT with other time zones using the visual time grid and hour-by-hour tables. Export meeting times with ICS download or send them to Google Calendar and Gmail.
How to Convert TOT to Other Time Zones
Open the Tonga Time converter page: Visit
https://www.xconvert.com/time-converter/tot-time-zoneto load a visual comparison grid with Tonga Time (TOT) already in place. This view is useful when you need to line up work hours for a call, schedule a travel-related check-in, or coordinate a handoff across teams that need to match a UTC+13 schedule.Add comparison cities with + Add City: Click + Add City and search for the cities you want to compare against TOT, such as London, New York, or Auckland for business communication, airline coordination, or remote project planning. Adding multiple rows lets you see how a Tonga Time work block lines up against other markets on the same 24-hour timeline, with green slots showing the most practical overlap.
Drag on the grid to select a meeting window: Use Select if needed, then drag across the TOT row to highlight a time range in purple; you can adjust it with the left and right handles or move the whole block by dragging the center. This is especially helpful when you want to test whether a morning slot in Tonga Time creates an evening or overnight call elsewhere before you send invites to clients, vendors, or distributed teammates.
Export the selected time range: 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 when you want to send a confirmed meeting window to a remote team, drop the time directly into a calendar, or share a link so everyone can view the same converted schedule in their own local time.
About Tonga Time (TOT)
Tonga Time, abbreviated TOT, is the standard time designation for this time zone. Its exact offset is UTC+13, which means local time in TOT is 13 hours ahead of Coordinated Universal Time.
TOT does not observe daylight saving time, and it has no counterpart. That makes it a fixed time zone abbreviation rather than one that alternates seasonally between standard time and daylight time.
Other abbreviations that share the same UTC+13 offset are FJST, NZDT, PHOT, TKT, and WST. Even when the offset matches, the abbreviation used depends on the location or regional timekeeping convention tied to that zone.
TOT and Daylight Saving Time
TOT does not observe DST. There is no seasonal switch, no alternate daylight abbreviation, and no part of the current year when Tonga Time moves to a different UTC offset.
Because TOT remains on UTC+13 year-round, there are no DST transition dates to track for this time zone. This consistency is useful for recurring scheduling because the Tonga Time side of a meeting stays fixed even when other regions change their clocks.
Frequently Asked Questions
What does TOT stand for?
TOT stands for Tonga Time. It is the abbreviation used for a time zone with a fixed offset of UTC+13.
Is TOT the same as GMT?
No, TOT is not the same as GMT. GMT is based on UTC+0, while TOT is UTC+13, so Tonga Time is 13 hours ahead of Greenwich Mean Time.
Which cities use TOT?
Specific principal cities are not listed here, but the abbreviation itself is Tonga Time. For conversion purposes, the key detail is that TOT uses a constant UTC+13 offset and does not switch seasonally.
What is the UTC offset for TOT?
The UTC offset for TOT is UTC+13. This means that when it is 00:00 UTC, the local time in Tonga Time is 13:00.
When does TOT change for daylight saving time?
TOT does not change for daylight saving time. It stays on UTC+13 throughout the entire year, with no start date, end date, or alternate seasonal abbreviation.
Does TOT have a daylight saving counterpart?
No, TOT has no counterpart. Unlike time zones that switch between a standard abbreviation and a daylight abbreviation, Tonga Time remains TOT year-round.
Are there other time zone abbreviations with the same offset as TOT?
Yes. Other abbreviations that share the same UTC+13 offset are FJST, NZDT, PHOT, TKT, and WST. The shared offset can be useful in scheduling, but the abbreviation itself still depends on the specific region using that time standard.