Click File and select and select Import/Export to open the Import/Export wizard.
Select Export to a file.
Select Outlook Data File (.pst)
Select the calendar folder you wish to export, uncheck the Include subfolders option
Click Browse to choose where to export the file and select Do not export duplicate items to avoid creating duplicate items when exporting and then select Finish.
You may add a password for the exported file if you wish, if you don't want to add a password then leave the fields blank and click Ok.
Your calendar is now exported.
