IANA time zone database
E4894
The IANA time zone database is a globally maintained, authoritative repository of time zone information used by most modern computer systems and software to handle local times and daylight saving rules.
All labels observed (21)
How this entity was disambiguated
This entity first appeared as the object of triple T76558 — 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: IANA time zone database Context triple: [North American time zones, relatedTo, IANA time zone database]
-
A.
North American time zones
North American time zones are the standardized regional time divisions used across countries in North America, including zones such as Eastern, Central, Mountain, and Pacific Time.
-
B.
Moscow Time
Moscow Time is the standard time zone used in Moscow and much of western Russia, corresponding to UTC+3 year-round.
-
C.
Time South Pacific
Time South Pacific is a regional edition of Time magazine tailored to news and issues relevant to readers in the South Pacific and surrounding Asia-Pacific areas.
-
D.
Time Canada
Time Canada was the Canadian regional edition of the American news magazine Time, tailored with content and coverage for Canadian readers.
-
E.
Japan Standard Time
Japan Standard Time is the standard time zone used throughout Japan, set at nine hours ahead of Coordinated Universal Time (UTC+9) without daylight saving time.
- 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: IANA time zone database Target entity description: The IANA time zone database is a globally maintained, authoritative repository of time zone information used by most modern computer systems and software to handle local times and daylight saving rules.
-
A.
North American time zones
North American time zones are the standardized regional time divisions used across countries in North America, including zones such as Eastern, Central, Mountain, and Pacific Time.
-
B.
Moscow Time
Moscow Time is the standard time zone used in Moscow and much of western Russia, corresponding to UTC+3 year-round.
-
C.
Time South Pacific
Time South Pacific is a regional edition of Time magazine tailored to news and issues relevant to readers in the South Pacific and surrounding Asia-Pacific areas.
-
D.
Time Canada
Time Canada was the Canadian regional edition of the American news magazine Time, tailored with content and coverage for Canadian readers.
-
E.
Japan Standard Time
Japan Standard Time is the standard time zone used throughout Japan, set at nine hours ahead of Coordinated Universal Time (UTC+9) without daylight saving time.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
public domain database
ⓘ
software standard ⓘ time zone database ⓘ |
| alsoKnownAs |
Olson database
ⓘ
IANA time zone database ⓘ
surface form:
tz database
IANA time zone database ⓘ
surface form:
zoneinfo database
|
| authority | de facto standard for time zone data ⓘ |
| contains |
current time zone information
ⓘ
future time zone rule changes ⓘ historical time zone information ⓘ |
| coordinatedWith |
Internet Corporation for Assigned Names and Numbers
ⓘ
surface form:
ICANN
|
| dataFormat |
text files
ⓘ
zoneinfo binary files ⓘ |
| distributedAs |
compiled binary data
ⓘ
source code ⓘ |
| exampleZoneName |
America/New_York
ⓘ
Japan Standard Time ⓘ
surface form:
Asia/Tokyo
Europe/London ⓘ |
| license | public domain ⓘ |
| maintainedBy |
Internet Assigned Numbers Authority
ⓘ
surface form:
IANA
Internet Assigned Numbers Authority ⓘ |
| namingConvention | Area/Location ⓘ |
| originallyMaintainedBy |
Arthur David Olson
ⓘ
Paul Eggert ⓘ |
| purpose |
handle daylight saving time rules
ⓘ
handle local times ⓘ provide time zone information ⓘ |
| relatedStandard | RFC 6557 ⓘ |
| repositoryLocation |
IANA time zone database
self-linksurface differs
ⓘ
surface form:
IANA time zone database mailing list and distribution site
|
| scope | global ⓘ |
| updated | periodically ⓘ |
| updateTrigger | changes in civil timekeeping laws ⓘ |
| usedBy |
.NET Framework
ⓘ
surface form:
.NET
Java ⓘ JavaScript runtimes ⓘ Linux distributions ⓘ MySQL ⓘ PHP ⓘ PostgreSQL ⓘ Python ⓘ Unix-like operating systems ⓘ browsers ⓘ macOS ⓘ many programming languages ⓘ most modern computer systems ⓘ |
| usedFor |
converting UTC to local time
ⓘ
scheduling across time zones ⓘ timestamp interpretation ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: IANA time zone database Description of subject: The IANA time zone database is a globally maintained, authoritative repository of time zone information used by most modern computer systems and software to handle local times and daylight saving rules.
Referenced by (88)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
tz database
this entity surface form:
tz database
this entity surface form:
IANA Time Zone Database project
this entity surface form:
tz database
this entity surface form:
tz database
this entity surface form:
IANA Time Zone Database Project
this entity surface form:
tz database
this entity surface form:
IANA Time Zone Database
this entity surface form:
IANA Time Zone Database project
this entity surface form:
tz database
this entity surface form:
IANA Time Zone Database project
this entity surface form:
tz database
this entity surface form:
IANA time zone database releases
this entity surface form:
glibc time zone implementation
this entity surface form:
tz database
this entity surface form:
IANA tz database
this entity surface form:
tz database
this entity surface form:
IANA Time Zone Database
this entity surface form:
tz database
this entity surface form:
IANA Time Zone Database (tzdb)
this entity surface form:
IANA tz database
this entity surface form:
tz database
subject surface form:
RFC 6557
subject surface form:
RFC 6557
this entity surface form:
tz database
subject surface form:
RFC 6557
this entity surface form:
TZDIST (Time Zone Data Distribution Service)
subject surface form:
RFC 6557
this entity surface form:
IANA Time Zone (TZ) Database
this entity surface form:
tz database
this entity surface form:
tz database