How can I sort collection items by publish date, not created date?

good to know, but the code you sent me still didn’t work. It left all sorts of blank spaces in the grid where items should be, but weren’t showing, and wasn’t in descending order. I’m not 100% what the order actually was..but the more I think it over, it seems like descending order was used to decide which items show on which page of items (I have 16 pages in that collection), but then within each page the items were definitely organized in ascending order (on the example site you sent the items seem to be in ascending order too). Any ideas on how to fix the display order and blank holes? Really need to get this going without adding an app that will charge me another monthly fee.