Feel free to poke around these help topics to find just what you're looking for.
View more on Events Timeline >>
1. Go to the Site Contents
2. Click on Add an App section
3. Search for the calendar template
4. Enter the name/description and create the list.
1. Edit the webpart.
2. In the webpart properties toolbar, expand Custom Properties
3. Select Data Source from dropdown to Custom list from host web
4. Enter your list name in Host Web List Name property
5. Save your page after pressing OK.