WorldClockTools.

IANA timezone

Antarctica/Troll.

BSTUTC+02:00Observing DST

Antarctica/Troll is the IANA timezone for Antarctica, currently at UTC+02:00 (BST). It observes daylight saving time, so the offset changes on the scheduled transition dates each year. The zone covers 1 city listed below, with live clocks updating every second.

Offset, DST behavior, and city coverage are refreshed from the live timezone dataset during the page revalidation window.

Current time in BST

--:--:--

Antarctica/Troll · UTC+02:00

All timezones in Antarctica →View BST abbreviation →

Abbreviation

BST

UTC Offset

UTC+02:00

DST Status

Observing DST

Country

Antarctica

Timezone planning depth

What Antarctica/Troll is useful for

A timezone page should do more than define an offset. These notes connect the zone to city clocks, DST behavior, converters, and adjacent country planning pages.

Zone identity

Antarctica/Troll is rendered as BST at UTC+02:00 for Antarctica. The IANA zone ID is the stable key; the abbreviation is only the short display label.

DST behavior

Antarctica/Troll has 2 scheduled offset transitions in the next 12 months. Next transition: March 28, 2027 (UTC+00:00 → UTC+02:00, +2h). Cumulative offset movement across the window is +4h. Use the IANA zone ID rather than a fixed UTC offset when scheduling across these dates.

City coverage

1 indexable city sits in this zone after locale and crawl-safety filters, with Troll among the examples shown.

Conversion handoff

BST has no pre-built converter pair, so a custom comparison runs through the general timezone converter instead.

Adjacent planning context

The most useful next steps from this timezone page are city clocks. Those links keep the zone page connected to real user tasks rather than stopping at an offset definition.

Abbreviations across the year

Antarctica/Troll resolves to multiple display abbreviations in the next 12 months: BST and GMT. The abbreviation rotates with the offset, which is why long-lived calendar entries should be anchored to the IANA zone instead of a saved abbreviation.

Offset stability

Antarctica/Troll spends about 217 days at UTC+02:00 across the forward 12-month window, which makes it the longer-running of two seasonal offsets. The remaining time is split across the other offsets listed in the year-of-DST card.

Peer zones at the same offset

Other IANA zones currently aligned at UTC+02:00 include Etc/UTC, Africa/Abidjan, Africa/Bamako, Africa/Bissau, and Africa/Conakry. Same-offset peers can drift apart later in the year if their DST rules differ, so a peer match today is not a permanent equivalence.

Country roster

Antarctica/Troll is used as the primary clock anchor for Antarctica. The roster is derived from country-zone mappings, so it reflects which jurisdictions adopt this IANA zone rather than which countries happen to share its current offset.
Timezone abbreviations can be ambiguous. The IANA zone name is the canonical key used for clocks, city pages, and conversion math.

Source-change watch

When timezone policy changes

Machine-readable rule source

Exact offsets and transition rows come from the IANA Time Zone Database as exposed by the deployed runtime. IANA publishes tzdb releases when governments change civil-time rules.

Check IANA Time Zone Database

Policy-source boundary

No jurisdiction-specific policy source is attached for Antarctica/Troll. Confirm legal clock-change announcements with the relevant government or time authority before relying on future rules.

Year-round offset behavior

Antarctica/Troll across the next 12 months

The forward 12-month sweep returned 2 scheduled offset transitions. Cumulative offset movement is +4h. Anchor stored timestamps to the IANA zone, not to a fixed UTC offset.

Date (local)Local timeFromToGap
March 28, 20273:00 AMUTC+00:00 (GMT)UTC+02:00 (GMT+2)+2h
October 31, 20271:00 AMUTC+02:00 (GMT+2)UTC+00:00 (GMT)-2h

Offset window

UTC+00:00 (GMT)

142 days

Offset window

UTC+02:00 (GMT+2)

217 days

Offset window

UTC+00:00 (GMT)

6 days

Primary offset across the window: UTC+02:00 (GMT+2) for about 217 days.

Coverage reference

What Antarctica/Troll covers

Country roster

Antarctica

Common abbreviations

BSTGMT

Abbreviations rotate with each DST transition — anchor calendar entries to the IANA zone, not an abbreviation.

Peer zones at UTC+00:00 right now

Etc/UTCAfrica/AbidjanAfrica/BamakoAfrica/BissauAfrica/ConakryAfrica/DakarAmerica/DanmarkshavnAfrica/Freetown

Same-offset peers can drift apart later in the year if their DST rules differ; today's offset match is not a permanent equivalence.

Top cities in Antarctica/Troll (by population)

Troll

DST mismatch radar

Meetings drift when regions change their clocks on different weekends. Dates below are computed from the IANA time zone rules as of 5 Nov 2026.

Upcoming DST shifts

  • United States and Canada
    Clocks go forward 1 hour · UTC-05:00 → UTC-04:00
    Sun 14 Mar 2027
  • UK and European Union
    Clocks go forward 1 hour · UTC+00:00 → UTC+01:00
    Sun 28 Mar 2027
  • New Zealand
    Clocks go back 1 hour · UTC+13:00 → UTC+12:00
    Sun 4 Apr 2027
  • South-east Australia
    Clocks go back 1 hour · UTC+11:00 → UTC+10:00
    Sun 4 Apr 2027

Meetings at risk

  • New York ↔ London
    • Sun 14 Mar 2027 (New York changes)5 h → 4 h
    • Sun 28 Mar 2027 (London changes)4 h → 5 h
    • Sun 31 Oct 2027 (London changes)5 h → 4 h
    • Sun 7 Nov 2027 (New York changes)4 h → 5 h

    4 h instead of 5 h for 14 days, Sun 14 Mar 2027 to Sun 28 Mar 2027.

    4 h instead of 5 h for 7 days, Sun 31 Oct 2027 to Sun 7 Nov 2027.

  • New York ↔ Sydney
    • Sun 14 Mar 2027 (New York changes)16 h → 15 h
    • Sun 4 Apr 2027 (Sydney changes)15 h → 14 h
    • Sun 3 Oct 2027 (Sydney changes)14 h → 15 h
    • Sun 7 Nov 2027 (New York changes)15 h → 16 h
  • London ↔ Sydney
    • Sun 28 Mar 2027 (London changes)11 h → 10 h
    • Sun 4 Apr 2027 (Sydney changes)10 h → 9 h
    • Sun 3 Oct 2027 (Sydney changes)9 h → 10 h
    • Sun 31 Oct 2027 (London changes)10 h → 11 h

Each gap is how many hours the second city is ahead of the first.

Cities in BST

Troll

FAQ

What is the current UTC offset for Antarctica/Troll?
Antarctica/Troll is currently at UTC+00:00 (GMT). The page revalidates weekly, but live clocks on this page tick from the IANA zone in real time.
Does Antarctica/Troll observe daylight saving time in 2027?
Yes. Antarctica/Troll has 2 scheduled transitions in the next 12 months. The first is March 28, 2027 (UTC+00:00 → UTC+02:00, +2h). Anchor saved timestamps to the IANA zone, not to a fixed UTC offset, so they survive the change automatically.
Which cities use Antarctica/Troll?
Antarctica/Troll is the canonical clock for cities including Troll. The page lists 1 indexable city in this zone after locale and crawl-safety filters.
What abbreviations does Antarctica/Troll use?
Antarctica/Troll resolves to BST, GMT across the next 12 months — the abbreviation rotates with each DST transition. Calendar entries should anchor to the IANA zone instead of an abbreviation so the right offset is used in each window.
Why does Antarctica use Antarctica/Troll?
Antarctica is mapped to Antarctica/Troll as one of its IANA zones in the country-zone catalog. The IANA zone records each jurisdiction's historical offset and DST rule changes; Antarctica/Troll stores the rules used by Antarctica (ISO AQ).

Related timezone pages

Most timezone-reference visits naturally branch into a country page, abbreviation page, or converter workflow.

Time in Antarctica

Open the country hub for city clocks, holidays, airports, and broader timezone context.

Timezone converter

Move from zone reference into hour-by-hour practical conversions.

Browse city pages

Use the human-readable city index if the next question is really about a city, not a zone string.