In order to have this display Latest Stories + Calendar in your Homepage exactly like the demo site, follow this simple instructions:
1- After clicking on Visit Website from the backend of your site, click on the option to edit this page as shown in the image below.
2- Enter the following piece of code: [widget=Bootstrap Theme - Display - Recent Articles with Sidebar]
3- Choose "Custom Homepage Content" for one of the sections in design settings.
4- Go to Toolbox/Sidebar Manager and search for the "Post Search Result sidebar. Add the Bootstrap Theme - Display - Events Calendar widget by dragging and dropping to the sidebar as shown bellow.
5- Save changes and you are done.