Time zone · Antarctic

TST

Troll Summer Time

Troll Summer Time covers the remote Antarctic research station in Troll, Antarctica, where the clock swings between UTC+00:00 and UTC+02:00 as daylight saving time is observed—helping crews keep long summer days productive under the midnight sun.

UTC+02:00 daylight1 IANA zone
Current time in TST☾ Night
05:27:25

Sunday, May 31, 2026

☾ NIGHT 06:00noon18:00
Standard
+00 · +0
IANA zones
1

Current offset

UTC+02:00

Daylight · +02

Daylight saving

Active

Reverts 25 Oct 2026

IANA zones

1

1 observe DST, 0 don't

DST offset

—

No summer variant

About TST

Standard time, with a summer shift.

Troll Summer Time covers the remote Antarctic research station in Troll, Antarctica, where the clock swings between UTC+00:00 and UTC+02:00 as daylight saving time is observed—helping crews keep long summer days productive under the midnight sun.

IANA zones · the technical identifiers

The zone that resolve to TST.

For software, always store the IANA identifier — never the abbreviation alone. The database keeps these zones distinct because their rules can, and historically did, diverge.

IANA zonePrimary cityDST
Antarctica/TrollTroll▲ DST

Where TST is used

One country.

Antarctica
TST · UTC+02:00

Same offset · UTC+02:00

Other zones at UTC+02:00 right now.

These named zones share TST's offset today. When daylight saving rules differ, they drift apart for part of the year.

CATUTC+2
--:--
Central Africa Time
Africa— No DST
MalawiBurundiBotswana +8
CESTUTC+2
--:--
Central European Summer Time
Europe▲ Observes DST
SpainSvalbard and Jan MayenNetherlands +28
EETUTC+2
--:--
Eastern European Standard Time
Africa▲ Observes DST
LibyaRussia
SASTUTC+2
--:--
South Africa Standard Time
Africa— No DST
South AfricaLesothoEswatini

Frequently asked questions

Common questions about TST, daylight saving, and how to handle it in software. Can't find what you need? Email [email protected].

What region does Troll Summer Time apply to?
It’s used only at the Troll research station in Antarctica.
How many time zones are in this region?
Just one zone: Antarctica/Troll.
Do all member zones observe daylight saving time?
Yes, all of them—currently the sole zone is in DST.
What’s unique about timekeeping in Troll?
The station jumps from UTC+00:00 to UTC+02:00 in summer to maximize use of continuous daylight.
What’s the abbreviation used right now?
It’s listed as +02 during DST.
When did the current offset start?
This period began on 2026-03-29 03:00:00 +02.
When is the next clock change?
The next shift is scheduled for 2026-10-25 01:00:00 +02.
Which country governs this region?
The Troll station is operated by Norway in Antarctica.
How does the extreme daylight affect life there?
Months of midnight sun simplify scheduling but require careful clock shifts to stay synced with the outside world.

Free · Developer API

Time, as JSON.

Every IANA time zone with live offsets, DST status, and the countries and cities that use them — clean, dependable JSON. Sign up free and get an API key in seconds.

GET /v1/timezones Live

countries, cities, convert, DST transitions coming next.

Get your free API key →
// France's time zones, right now
GET /v1/timezones?country=fr
{
"data": [
{
"iana": "Europe/Paris",
"display_name": "Paris",
"current": {
"utc_offset": "+02:00",
"abbreviation": "CEST",
"is_dst": true
}
}
]
}