Adding the Web Part to a Page in SharePoint 2013
When Mini Calendar Web Part is installed, go to required SharePoint site page and add web part through the site settings. Click “Edit” on Page, then press “Insert” on the ribbon and choose “Web Part”.
Select “Virto Solution” in Categories and then select Virto Mini Calendar Web Part from the list of available web parts.
Now add Mini Calendar Web Part to the SharePoint site page and save the changes on page.