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Pacific/Guam

Pacific/Guam is the IANA time zone for Guam.

UTC+10:00

Tue, Sep 29 UTC+10 ChST

Offsets and daylight saving time

Standard offset
UTC+10:00
Rule
No daylight saving time: UTC+10 all year.

No clock changes are scheduled in the next three years.

Names

Generic name
Chamorro Standard Time
Abbreviation
ChST
Long name
Chamorro Standard Time

Use it in code

// JavaScript
new Intl.DateTimeFormat('en-US', { timeZone: 'Pacific/Guam' })

# Python
from zoneinfo import ZoneInfo
ZoneInfo('Pacific/Guam')

-- PostgreSQL
SELECT now() AT TIME ZONE 'Pacific/Guam';

Cities in Pacific/Guam

Also in this zone: Yigo Village, Tamuning-Tumon-Harmon Village, Mangilao Village.

Offset history since 1970

  • 1970–1971: UTC+10 and UTC+11 each year
  • 1972: UTC+10
  • 1973–1974: UTC+10 and UTC+11 each year
  • 1975: UTC+10
  • 1976–1977: UTC+10 and UTC+11 each year
  • 1978–2026: UTC+10

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