America/Thule time zone

America/Thule is an IANA time zone used in Greenland. It is on standard time now, UTC−4 (AST), until Sunday, March 14, 2027.

America/Thule at a glance

Rules of the America/Thule time zone

America/Thule switches between two offsets: UTC−4 (AST) for standard time and UTC−3 (ADT) for daylight saving time. Below are the last changes and the ones scheduled next.

Recent and upcoming changes in America/Thule

Where America/Thule is used

America/Thule is used in Greenland. None of the cities in our list follow it.

America/Thule compared with other time zones

Differences change during the year when one side moves to or from daylight saving time, so the table shows January and July separately.

Other zones on UTC−4 right now

These IANA zones show the same time as America/Thule today. Their clock-change rules may differ.

• America/Anguilla
• America/Antigua
• America/Aruba
• America/Barbados
• America/Boa_Vista
• America/Campo_Grande
• America/Caracas
• America/Cuiaba
• America/Curacao
• America/Dominica
• America/Glace_Bay
• America/Grenada

Using America/Thule in software

Store and send the zone as its IANA name, America/Thule, not as a fixed offset. A fixed offset such as UTC−4 gives the wrong result after the next clock change.

Show the current time in America/Thule:

// JavaScript
new Intl.DateTimeFormat('en-GB', { timeZone: 'America/Thule', timeStyle: 'long' }).format(new Date());
# Python
from datetime import datetime
from zoneinfo import ZoneInfo
datetime.now(ZoneInfo('America/Thule'))
// PHP
(new DateTime('now', new DateTimeZone('America/Thule')))->format('c');
# Shell
TZ=America/Thule date

Tools for time in America/Thule

• Convert a time to or from America/Thule: pick a date and time and see it in every city on your list.
• Add America/Thule to your world clock to keep it next to your own time.
• Find a meeting time that falls inside office hours in America/Thule and the other cities you work with.
• Open a full-screen clock for your own time zone.

Frequently asked questions

Time zone rules: IANA tz database, version 2026e. Place names and coordinates: GeoNames. Sunrise and sunset are calculated from the coordinates and can differ by a minute or two from local almanacs.