The Zotero Timeline allows you to visualise the items in a Zotero collection on a chronological basis, using either the publication date or the date you added the item to Zotero.
To create a timeline, go to the Tools menu, and select "Create Timeline". A timeline will be created for the collection that is open on your desktop. You can navigate laterally on the timeline, change the default option "date published" to "date added" or "date modified", or highlight a specific search term in one of the 4 colours provided.