America/Adak time zone

America/Adak is an IANA time zone used in United States. It is on standard time now, UTC−10 (HST), until Sunday, March 14, 2027.

America/Adak at a glance

Rules of the America/Adak time zone

Standard time in America/Adak is UTC−10 (HST). During daylight saving time the zone moves 1 hour to UTC−9 (HDT). The table lists the recent and upcoming changes as recorded in tz database version 2026e.

Recent and upcoming changes in America/Adak

The base offset of this zone changed in 1983, from UTC−11 to UTC−10. Old timestamps should be converted with the rule that applied at the time.

Where America/Adak is used

America/Adak is used in United States. None of the cities in our list follow it.

America/Adak 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−10 right now

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

• Pacific/Honolulu
• Pacific/Rarotonga
• Pacific/Tahiti

Using America/Adak in software

Use the zone name America/Adak rather than an abbreviation or a fixed offset. Abbreviations can mean several zones, and offsets ignore future clock changes.

Show the current time in America/Adak:

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

Plan around the time in America/Adak

• Convert a time to or from America/Adak: pick a date and time and see it in every city on your list.
• Add America/Adak to your world clock to keep it next to your own time.
• Find a meeting time that falls inside office hours in America/Adak 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.