Chatham Standard Time
E82253
Chatham Standard Time is a time zone used in New Zealand’s Chatham Islands, offset by UTC+12:45 and distinct for its unusual 45-minute difference from most other time zones.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Chatham Standard Time canonical | 12 |
| Chatham Daylight Time | 3 |
How this entity was disambiguated
This entity first appeared as the object of triple T666453 — 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: Chatham Standard Time Context triple: [New Zealand Standard Time, relatedTimeZone, Chatham Standard Time]
-
A.
Easter Island Standard Time
Easter Island Standard Time is the time zone used on Chile’s Easter Island, typically four hours behind Coordinated Universal Time (UTC−6) outside of daylight saving periods.
-
B.
Newfoundland Time Zone
The Newfoundland Time Zone is a unique North American time zone centered on the Canadian island of Newfoundland, notable for its unusual half-hour offset from standard hour-based time zones.
-
C.
Atlantic Time Zone
The Atlantic Time Zone is a North American time zone used in eastern Canada and parts of the Caribbean, typically one hour ahead of Eastern Time.
-
D.
Georgia Standard Time
Georgia Standard Time is the time zone used throughout the country of Georgia, set at UTC+4 with no daylight saving time.
-
E.
New Zealand Daylight Time
New Zealand Daylight Time is the daylight saving time zone used in New Zealand, typically observed during the Southern Hemisphere summer months.
- 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: Chatham Standard Time Target entity description: Chatham Standard Time is a time zone used in New Zealand’s Chatham Islands, offset by UTC+12:45 and distinct for its unusual 45-minute difference from most other time zones.
-
A.
Easter Island Standard Time
Easter Island Standard Time is the time zone used on Chile’s Easter Island, typically four hours behind Coordinated Universal Time (UTC−6) outside of daylight saving periods.
-
B.
Newfoundland Time Zone
The Newfoundland Time Zone is a unique North American time zone centered on the Canadian island of Newfoundland, notable for its unusual half-hour offset from standard hour-based time zones.
-
C.
Atlantic Time Zone
The Atlantic Time Zone is a North American time zone used in eastern Canada and parts of the Caribbean, typically one hour ahead of Eastern Time.
-
D.
Georgia Standard Time
Georgia Standard Time is the time zone used throughout the country of Georgia, set at UTC+4 with no daylight saving time.
-
E.
New Zealand Daylight Time
New Zealand Daylight Time is the daylight saving time zone used in New Zealand, typically observed during the Southern Hemisphere summer months.
- F. None of above. chosen
Statements (30)
| Predicate | Object |
|---|---|
| instanceOf | time zone ⓘ |
| appliesTo |
Chatham Island
ⓘ
linked to:
Chatham Islands
Pitt Island ⓘ |
| country | New Zealand ⓘ |
| DSTAbbreviation | CHADT ⓘ |
| DSTIsAheadOfNewZealandDaylightTime | 0:45 ⓘ |
| DSTIsAheadOfUTC | true ⓘ |
| DSTName |
Chatham Daylight Time
ⓘ
linked to:
Chatham Standard Time
|
| DSTOffsetMinutes | 825 ⓘ |
| DSTOffsetType | non-integer hour offset ⓘ |
| DSTUTCOffset | +13:45 ⓘ |
| followsStandardTime | true ⓘ |
| hemisphere | Southern Hemisphere ⓘ |
| IANAZoneIdentifier | Pacific/Chatham ⓘ |
| isAheadOfNewZealandStandardTime | 0:45 ⓘ |
| isAheadOfUTC | true ⓘ |
| isIslandTimeZone | true ⓘ |
| isUnusualOffset | true ⓘ |
| legalJurisdiction | New Zealand ⓘ |
| observesDaylightSavingVariant |
Chatham Daylight Time
ⓘ
linked to:
Chatham Standard Time
|
| offsetType | non-integer hour offset ⓘ |
| partOf | time in New Zealand ⓘ |
| region | Pacific Ocean ⓘ |
| relatedTimeZone | New Zealand Standard Time ⓘ |
| timeNotation | 24-hour clock (official) ⓘ |
| timeOffsetHours | 12.75 ⓘ |
| timeOffsetMinutes | 765 ⓘ |
| timeZoneAbbreviation | CHAST ⓘ |
| usedIn | Chatham Islands ⓘ |
| UTCOffset | +12:45 ⓘ |
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: Chatham Standard Time Description of subject: Chatham Standard Time is a time zone used in New Zealand’s Chatham Islands, offset by UTC+12:45 and distinct for its unusual 45-minute difference from most other time zones.
Referenced by (15)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Chatham Standard Time
linked to: Chatham Standard Time
subject linked to:
Chatham Standard Time is 45 minutes ahead of NZST
linked to: Chatham Standard Time