Addshore added a comment. Okay, so when entering "31 September 1949" through the Frontend in an edit and saved it is formatted as "1 October 1949" and correctly saved as "+00000000019-10-01T00:00:00Z" This suggests that the date in question has been added through the API and extra validation is needed there...
However looking further at the Item I see this edit https://www.wikidata.org/w/index.php?title=Q5906&diff=118880783&oldid=118880605 in which the 31 September is added. Presuming the Front-end was either fixed after this edit (Which was in April) I think it is time to check the API validation! TASK DETAIL https://phabricator.wikimedia.org/T85296 REPLY HANDLER ACTIONS Reply to comment or attach files, or !close, !claim, !unsubscribe or !assign <username>. EMAIL PREFERENCES https://phabricator.wikimedia.org/settings/panel/emailpreferences/ To: Addshore Cc: Aklapper, Smalyshev, daniel, thiemowmde, JanZerebecki, Addshore, Wikidata-bugs, aude _______________________________________________ Wikidata-bugs mailing list Wikidata-bugs@lists.wikimedia.org https://lists.wikimedia.org/mailman/listinfo/wikidata-bugs