How to import a .csv file into Outlook
From Outlook choose File, Import and Export...
Chose 'Import from another program or file' from the list of actions
Select 'Comma Seperated Values (Windows)' from the list of file types
Click the 'Browse...' button and navigate to the .csv file you downloaded (default - TimeTrialEvents.csv)
Make sure the Calendar is selected as the destination folder
Click the 'Finish' button to complete the import