Calcutta Time
E32409
Calcutta Time was a former local time standard used in Kolkata (then Calcutta) before the adoption of a unified national time zone in India.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Calcutta Time canonical | 3 |
Statements (37)
| Predicate | Object |
|---|---|
| instanceOf |
local time
ⓘ
time standard ⓘ |
| alsoKnownAs | Calcutta local time ⓘ |
| appliesTo |
city of Calcutta
ⓘ
Calcutta ⓘ
surface form:
city of Kolkata
|
| basedOn | local mean time at Calcutta ⓘ |
| classification | historical time zone ⓘ |
| coexistedWith |
Bombay Time
ⓘ
Indian Standard Time ⓘ Madras Time ⓘ |
| country | India ⓘ |
| differenceFromGMTInMinutes | 353.3333 ⓘ |
| differenceFromISTInMinutes | −5.6667 ⓘ |
| geographicReference | longitude of Calcutta ⓘ |
| historicalContext | colonial India ⓘ |
| historicalSignificance | illustrates pre-unification local times in India ⓘ |
| namedAfter | Calcutta ⓘ |
| regionType | single-city time ⓘ |
| replacedBy | Indian Standard Time ⓘ |
| replacedLocalTimesIn | none (was itself a local time) ⓘ |
| standardizedBy | local authorities in Calcutta ⓘ |
| status | defunct ⓘ |
| timeType | mean solar time ⓘ |
| timeZoneOffset | UTC+05:53:20 ⓘ |
| timeZoneOffsetFromIST | −0:05:40 ⓘ |
| timeZoneOffsetFromUTCInMinutes | 353.3333 ⓘ |
| timeZoneOffsetHours | UTC+5.8889 ⓘ |
| usedBefore | Indian Standard Time ⓘ |
| usedBy |
colonial administration in Calcutta
ⓘ
residents of Calcutta ⓘ |
| usedFor |
civil timekeeping in Calcutta
ⓘ
railway timetables in Calcutta ⓘ |
| usedIn |
Calcutta
ⓘ
Calcutta ⓘ
surface form:
Kolkata
|
| usedInCentury |
19th century
ⓘ
20th century ⓘ |
| usedUntil | mid-20th century ⓘ |
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: Calcutta Time Description of subject: Calcutta Time was a former local time standard used in Kolkata (then Calcutta) before the adoption of a unified national time zone in India.
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.