Mountain Standard Time (no DST, Arizona)

E677426

time zone

Mountain Standard Time (no DST, Arizona) is the year-round time observed in most of Arizona, remaining on standard time all year instead of switching to daylight saving time.

Try in SPARQL Jump to: Surface forms Disambiguation Statements Elicitation Referenced by

All labels observed (5)

Label	Occurrences
Mountain Standard Time	57
Mountain Standard Time (no DST, Arizona) canonical	2
Arizona (no DST portion of MST)	1
Arizona (no DST)	1
Mountain Time (Arizona)	1

How this entity was disambiguated

This entity first appeared as the object of triple T7619601 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.

NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07

Target entity: Mountain Standard Time (no DST, Arizona)
Context triple: [Mather Point, inTimeZone, Mountain Standard Time (no DST, Arizona)]

A. Mountain Daylight Time
Mountain Daylight Time is the daylight saving time observed in the Mountain Time Zone of North America, typically one hour ahead of Mountain Standard Time.
B. Mountain Time Zone
The Mountain Time Zone is a North American time zone that covers parts of the central-western United States, Canada, and Mexico, lying between the Pacific and Central time zones.
C. Alaska Daylight Time
Alaska Daylight Time is the daylight saving time observed in most of the U.S. state of Alaska, running one hour ahead of Alaska Standard Time.
D. America/Denver
America/Denver is the IANA time zone identifier for the Mountain Time Zone in the United States, covering cities such as Denver and aligning with Mountain Standard and Mountain Daylight Time conventions.
E. National Standard Time
National Standard Time is the official time standard used in Taiwan, corresponding to UTC+8.
F. None of above. chosen
G. Unsure - the case is ambiguous/there is not enough information to decide.

NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07

Target entity: Mountain Standard Time (no DST, Arizona)
Target entity description: Mountain Standard Time (no DST, Arizona) is the year-round time observed in most of Arizona, remaining on standard time all year instead of switching to daylight saving time.

A. Mountain Daylight Time
Mountain Daylight Time is the daylight saving time observed in the Mountain Time Zone of North America, typically one hour ahead of Mountain Standard Time.
B. Mountain Time Zone
The Mountain Time Zone is a North American time zone that covers parts of the central-western United States, Canada, and Mexico, lying between the Pacific and Central time zones.
C. Alaska Daylight Time
Alaska Daylight Time is the daylight saving time observed in most of the U.S. state of Alaska, running one hour ahead of Alaska Standard Time.
D. America/Denver
America/Denver is the IANA time zone identifier for the Mountain Time Zone in the United States, covering cities such as Denver and aligning with Mountain Standard and Mountain Daylight Time conventions.
E. National Standard Time
National Standard Time is the official time standard used in Taiwan, corresponding to UTC+8.
F. None of above. chosen

Statements (46)

Predicate	Object
instanceOf	time zone ⓘ
appliesToRegion	Arizona ⓘ most of Arizona ⓘ
classification	non-DST-observing time zone ⓘ
correspondsToAbbreviation	MST ⓘ
correspondsToFullName	Mountain Standard Time ⓘ linked to: Mountain Time Zone
correspondsToIANAZone	America/Phoenix ⓘ
country	United States of America ⓘ
doesNotObserve	United States daylight saving time rules ⓘ
DSTStatusDescription	remains on standard time all year ⓘ
DSTTransitionPolicy	no clock changes between winter and summer ⓘ
excludesRegion	Navajo Nation in Arizona ⓘ linked to: Navajo Nation
governingLawJurisdiction	United States federal time law with Arizona exemptions ⓘ
historicalContext	Arizona opted out of daylight saving time under U.S. law ⓘ
isDaylightSavingVariantOf	none ⓘ
legalStatus	official time in most of Arizona ⓘ
locatedInTimeZoneRegion	North American time zones ⓘ
notObservedIn	Navajo Nation (which uses DST) ⓘ linked to: Navajo Nation
observedBy	State of Arizona government (except Navajo Nation areas) ⓘ linked to: Government of Arizona most businesses in Arizona ⓘ most residents of Arizona ⓘ
observedIn	Central Arizona ⓘ linked to: central Arizona Phoenix metropolitan area ⓘ Southern Arizona ⓘ Western Arizona ⓘ linked to: western Arizona
observesDaylightSavingTime	no ⓘ
offsetInHours	-7 ⓘ
offsetInMinutes	-420 ⓘ
primaryCityReference	Mesa ⓘ linked to: Mesa, Arizona Phoenix ⓘ Tucson ⓘ
regionCodeExample	US-AZ ⓘ
regionType	subnational time zone practice ⓘ
relatedIANAZone	America/Denver (DST-observing Mountain Time) ⓘ
relatedTimeZone	Mountain Time Zone ⓘ Pacific Time Zone ⓘ
sameClockTimeAs	Mountain Daylight Time during summer ⓘ
sameUTCOffsetAs	Pacific Daylight Time ⓘ linked to: Pacific Time Zone
timeNotation	12-hour clock commonly used ⓘ
timeOffsetFromUTC	UTC−07:00 ⓘ
typicalSummerRelation	matches clock time of Denver in winter but Los Angeles in summer ⓘ
typicalUseCase	systems needing fixed UTC−07:00 time in Arizona ⓘ
usedFor	broadcast times in Arizona ⓘ scheduling within Arizona ⓘ transport timetables in Arizona ⓘ
usesStandardTimeYearRound	yes ⓘ

How these facts were elicited