Steps to setup angular UI-calendar in Service Portal.
- Navigate to https://developer.servicenow.com/app.do#!/share/contents/3031851_angular_bootstrap_calendar_widget?v=1.0&t=PRODUCT_DETAILS
2. Download the update set.
3. Navigate to 'Retrieved Update Sets' module.
4. Click the link to "Import update set from XML".
5. Go into the record and Preview and then Commit the update set.
Now you will have a calendar widget on your Service Portal widget.