When I open the calendar it keeps running and says that it says it is moving calendar to to server account...

bachle,

Quit/Force Quit Calendar, then paste this text ~/Library into the Finder>Go>Go to Folder...window and select "Go." This will open the Users Library Folder.

Next open the Calendars Folder and move any any files with "Cache" listed in the name field to your Desktop.

Also open the Preferences Folder in the same Library, and move the com.apple.iCal.plist file to the Desktop.

Log out/in or restart, and open Calendar.