In the Curriculum Engine, if you have exported a calendar layer's information into an iCalendar file (Help Topic: Exporting Calendar Layers), you can import that file back in to the Curriculum Engine as a new layer.
Directions:
Click on the button below the calendar.
Click on the button to display the "Import Calendar Layer Archive" overlay.
Select the file to import by clicking on the button (Firefox/Internet Explorer) or the button (Chrome/Safari).
Click on the button to upload the file.
After the file has been uploaded and processed on the server (which may take a few minutes depending on your file's size), an overlay will appear detailing the results (e.g., the name of the newly uploaded/created calendar layer and the number of new items on that layer).