When creating a timeline powered by a CMS collection, one needs to create a separated Collection only for the timeline. Most events-sites have a timeline attached to every individual event (Conferences, Seminars etc.) A very usual Tabs element would do, but there must be a field type inside each collection that allows to safe Hour + Title + Description, each of the hours feeding one Tab on the element.

It's not needed to use Tabs, can also be text boxes etc. but the Field Type is needed inside Collection Settings.