Entourage does not directly support import of calendar events in Comma Separated Values file format (.csv).  To import calendar events from CalendarWiz (or Microsoft Outlook) that are in the .csv format you need a set of scripts developed by Paul Berkowitz. for export-Import with Entourage.

You can find these scripts at the following links::

Script Home Page

http://scriptbuilders.net/files/exportimportentourage1.3.10.html

Script Download

http://files.macscripter.net/ScriptBuilders/Entourage/exportimportentouragex_1310.zip