Current Time in Guam

Daylight saving time in Guam

Guam does not observe daylight saving time. Its offset stays at UTC+10:00 every day of the year, which makes it one of the simpler zones to work with: a fixed offset is enough to convert any timestamp, and there are no missing or repeated local hours.

Converting timestamps for this zone in code

Always pass the IANA identifier Pacific/Guam rather than a numeric offset. The identifier carries the zone's entire history of offset and daylight saving changes, so a timestamp from any year converts correctly; a hard-coded offset is only right until the next rule change.

# Python
from datetime import datetime
from zoneinfo import ZoneInfo
datetime.fromtimestamp(1710050400, ZoneInfo("Pacific/Guam"))

// JavaScript
new Intl.DateTimeFormat('en-GB', { timeZone: 'Pacific/Guam',
  dateStyle: 'full', timeStyle: 'long' }).format(new Date(1710050400 * 1000));

<?php // PHP
(new DateTimeImmutable("@1710050400"))->setTimezone(new DateTimeZone("Pacific/Guam"));

More languages on the code examples pages.

How this zone's rules have changed since 1970

Guam has changed its arrangement 5 times since 1970. This is why a stored offset is not a substitute for the zone identifier — a timestamp from before a change converts incorrectly if you apply today's rule to it.

Boundaries are the years the change took effect, derived from the same IANA database your language's date library reads.

When it is 12:00 in Guam

Midday here against the clocks most schedules are written around, for Thursday, 22 October 2026 at 12:00:00 GMT+10:

Zones currently on UTC+10:00

8 other IANA zones are on UTC+10:00 at this moment. They agree on the clock today but not necessarily tomorrow — zones that observe daylight saving on different dates diverge and rejoin through the year, which is why an offset alone can never stand in for a zone.

• DumontDUrvilleAntarctica/DumontDUrville
• Ust-NeraAsia/Ust-Nera
• VladivostokAsia/Vladivostok
• BrisbaneAustralia/Brisbane
• LindemanAustralia/Lindeman
• ChuukPacific/Chuuk
• Port MoresbyPacific/Port_Moresby
• SaipanPacific/Saipan