Wikidata:Property proposal/date of release

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date of release[edit]

Originally proposed at Wikidata:Property proposal/Generic

   Not done
Descriptionthe date that something became available to a wider audience in some way
Representspublication (Q732577), sort of
Data typePoint in time
Domainartificial entity (Q16686448)?
Example 1Portal 2 (Q279446) → 19 April 2011
Example 2MISSING
Example 3MISSING
Planned useI'm not doing this for myself; that's not how it's supposed to work
See alsopublication date (P577)


Yes, I know, publication date (P577) already exists.

publication date (P577) is currently used for both real dates (when the secondary sources say a film was released) and made-up dates (the date on the cover of the magazine, which is actually incorrect because half the articles were published on their website the month before). This property would be for the real dates. This would be useful for data analysis, information published in magazines and journals (see my comments at Wikidata:Project chat#Modelling a publication schedule), and biological classification (see EncycloPetey's comments at Wikidata:Project chat#publication date vs inception (in general)). In short, having the actual date information was disseminated instead of a made-up date is useful sometimes because one of them is factual, and occasionally some other information (like the naming of a species) depends on the small difference between those dates.

This would replace or duplicate publication date (P577) where it is verified with secondary sources that the date is real, and would be added alongside publication date (P577) where it is verified that the stated date is not real. Jc86035 (talk) 17:28, 16 July 2018 (UTC)


I question what is meant by "real" dates here. publication date (P577) is necessary for the stated date of publication of a work even if the stated date is not the actual date. While issues of priority in biological classification rely upon the actual releases date, bibliographical needs require the stated date of publication printed on the materials. We can't says that one property supplants the other. --EncycloPetey (talk) 17:41, 16 July 2018 (UTC)

@EncycloPetey: For brevity and at the risk of making the proposal seem a bit incoherent, a "real" date for the purposes of those two paragraphs is one which is set in reality – the "actual" release date. I misused "supplant"; I meant "supplement". Jc86035 (talk) 17:45, 16 July 2018 (UTC)

 Not done No support.--Micru (talk) 13:51, 19 December 2018 (UTC)