Facebook - Importing Public Events
You can add public events hosted by other people and Pages to your Page. When you add an event to your Page, it will appear in the Events tab on the left side of your Page.
Add an Event
To add another person's or Page's event to your Page:
Go to the event
Click and select Add to Page...
Select a Page and click Add Event
Remove an Event
To remove another person's or Page's event from your Page
Go to your Page and click Events in the left column
Hover over the event you'd like to remove and click x in the top right of the event