Summary:
The first step in creating a Timeline is to create a Timeline Contact Sheet. This is where the information of each Timeline item will live.

The first step in creating a Timeline is to create a Timeline Contact Sheet. This is where the information of each Timeline item will live.
In the websites pane of the CQ GUI, navigate to the site you're working on. Create a new page using the "Contact Sheet: Timeline" template. This page will be a reference for your Timeline
The Contact Sheet will hold the information, while the Timeline will present it on the page.
Once you're in the authoring environment for the Contact Sheet, you should see just one available component: UC Timeline Item. Click and drag that in, and on the blue bar that apears, click edit.
This is where you'll define the information that appears on the Timeline, and where it will link to.