Lucas_Werkmeister_WMDE added a comment.
As mentioned in the RDF documentation <https://www.mediawiki.org/wiki/Wikibase/Indexing/RDF_Dump_Format#Time>, for the query service timestamps are always converted to the proleptic Gregorian calendar, even if the original value was in the Julian calendar. So unless I’m mistaken, this is //correct// handling of Julian and Gregorian dates (you can compare them in the query without caring about what the original calendar was), just maybe not what you expected. TASK DETAIL https://phabricator.wikimedia.org/T234950 EMAIL PREFERENCES https://phabricator.wikimedia.org/settings/panel/emailpreferences/ To: Lucas_Werkmeister_WMDE Cc: Lucas_Werkmeister_WMDE, Aklapper, ArchibaldWagner, darthmon_wmde, DannyS712, Nandana, Lahi, Gq86, GoranSMilovanovic, QZanden, EBjune, merbst, LawExplorer, _jensen, rosalieper, Jonas, Xmlizer, jkroll, Smalyshev, Wikidata-bugs, Jdouglas, aude, Tobias1984, Manybubbles, Mbch331
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