Irish Standard Time
E33169
Irish Standard Time is the daylight saving time observed in Ireland, operating one hour ahead of Coordinated Universal Time (UTC+1) during the summer months.
All labels observed (5)
| Label | Occurrences |
|---|---|
| Irish Standard Time canonical | 435 |
| Irish Standard Time (summer) | 2 |
| Europe/Dublin | 1 |
| IST (Irish Standard Time) | 1 |
| Irish Standard Time / British Summer Time | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T257919 — 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: Irish Standard Time Context triple: [Ireland, timeZoneDST, Irish Standard Time]
-
A.
Western European Time
Western European Time is a standard time zone used in parts of Western Europe, including Portugal, that aligns with Coordinated Universal Time (UTC+0) during the non-daylight saving period.
-
B.
Greenwich Mean Time
Greenwich Mean Time is the mean solar time at the Royal Observatory in Greenwich, London, historically used as the world’s primary reference for timekeeping and the basis for Coordinated Universal Time (UTC).
-
C.
Central European Time
Central European Time is a standard time zone used by many countries in central and western Europe, typically one hour ahead of Coordinated Universal Time (UTC+1).
-
D.
Europe/London
Europe/London is the time zone used in the United Kingdom, observing Greenwich Mean Time (GMT) in winter and British Summer Time (BST) in summer.
-
E.
British Summer Time
British Summer Time is the daylight saving time observed in the United Kingdom, during which clocks are set one hour ahead of Greenwich Mean Time to extend evening daylight in the 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: Irish Standard Time Target entity description: Irish Standard Time is the daylight saving time observed in Ireland, operating one hour ahead of Coordinated Universal Time (UTC+1) during the summer months.
-
A.
Western European Time
Western European Time is a standard time zone used in parts of Western Europe, including Portugal, that aligns with Coordinated Universal Time (UTC+0) during the non-daylight saving period.
-
B.
Greenwich Mean Time
Greenwich Mean Time is the mean solar time at the Royal Observatory in Greenwich, London, historically used as the world’s primary reference for timekeeping and the basis for Coordinated Universal Time (UTC).
-
C.
Central European Time
Central European Time is a standard time zone used by many countries in central and western Europe, typically one hour ahead of Coordinated Universal Time (UTC+1).
-
D.
Europe/London
Europe/London is the time zone used in the United Kingdom, observing Greenwich Mean Time (GMT) in winter and British Summer Time (BST) in summer.
-
E.
British Summer Time
British Summer Time is the daylight saving time observed in the United Kingdom, during which clocks are set one hour ahead of Greenwich Mean Time to extend evening daylight in the summer months.
- F. None of above. chosen
Statements (43)
| Predicate | Object |
|---|---|
| instanceOf |
daylight saving time
ⓘ
time standard ⓘ |
| appliesToTerritory | entire territory of the Republic of Ireland ⓘ |
| basedOn | Coordinated Universal Time ⓘ |
| category |
Time in Ireland
ⓘ
Time zones in Europe ⓘ |
| clockChangeDirectionAtEnd | clocks go back by one hour ⓘ |
| clockChangeDirectionAtStart | clocks advance by one hour ⓘ |
| coincidesWith |
British Summer Time
ⓘ
Central European Summer Time (by UTC offset only) ⓘ |
| country | Ireland ⓘ |
| DSTStatus | active only part of the year ⓘ |
| DSTType | summer time ⓘ |
| governingBody | Government of Ireland ⓘ |
| hasOppositeSeasonTime | Greenwich Mean Time in Ireland ⓘ |
| hemisphere | Northern Hemisphere ⓘ |
| IANAZoneExample | Europe/Dublin ⓘ |
| isDaylightSavingFor |
Greenwich Mean Time
ⓘ
Western European Time ⓘ |
| isOneHourAheadOf |
Greenwich Mean Time (when GMT is UTC+0)
ⓘ
linked to:
Greenwich Mean Time
UTC ⓘ |
| legalNameInIrishLaw |
Am Caighdeánach Éireannach
ⓘ
Irish Standard Time ⓘ |
| observedDuring | summer months ⓘ |
| observesDST | yes ⓘ |
| offsetFromUTCInHours | 1 ⓘ |
| primaryUse | civil timekeeping in Ireland during summer ⓘ |
| region | Europe ⓘ |
| regulatedBy | Irish legislation on time ⓘ |
| seasonalAdjustmentReason | better use of evening daylight ⓘ |
| timeNotationCommonlyUsed |
12-hour clock
ⓘ
24-hour clock ⓘ |
| timeScaleReference |
Coordinated Universal Time (UTC)
ⓘ
linked to:
Coordinated Universal Time
|
| timeZoneName | IST ⓘ |
| typicalEndMonth | October ⓘ |
| typicalStartMonth | March ⓘ |
| usedFor |
broadcast scheduling in Ireland
ⓘ
business hours scheduling in Ireland ⓘ legal and administrative time in Ireland ⓘ public transport timetables in Ireland ⓘ |
| usedForCivilTime | true ⓘ |
| usedInCapitalCity | Dublin ⓘ |
| UTCOffset | UTC+1 ⓘ |
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: Irish Standard Time Description of subject: Irish Standard Time is the daylight saving time observed in Ireland, operating one hour ahead of Coordinated Universal Time (UTC+1) during the summer months.
Referenced by (440)
Full triples — surface form annotated when it differs from this entity's canonical label.
linked to: Irish Standard Time
subject linked to:
Blackrock
subject linked to:
Ballylongford, County Kerry, Ireland
subject linked to:
Tourmakeady, County Mayo, Ireland