I am a developer working to transfer a wordpress site to SharePoint 2013 using cross site publishing. This means an authoring site to create pages, and a publishing site to display them. On the authoring site I have pages in a list with scheduled publishing enabled. These pages are crawled by the publishing site, and I am displaying data about them in a content search web part. All of this works, it is just background.
By default, it appears the query for the web part sorts by the created date of these pages. I need to sort them by their Publishing Start Date. When transferring old articles from wordpress, they need to retain their original order.
When editing the query through the SharePoint UI, I press "change query". In advanced mode, I go to the sorting tab. Even though the Publishing start date has a managed property, it isn't in this list. Any idea of how I can make it sort by the Publishing Start Date?