Gremmie writes:  

GCalendar version 1.5.0 is now available! And it works on RavenNuke 2.10.x, and especially with the RavenNuke WYSIWYG editor!

The 1.5.0 release of GCalendar fixes several "monthly by day" repeating event bugs, adds a new "RSVP" feature, adds tool tips to the blocks, Norwegian language files, and many other minor improvements.

GCalendar is an event calendar module for PHP-Nuke. GCalendar features: monthly, weekly, and daily views; repeating events; user submitted events with optional admin approval; CSS to customize appearance; printable views; support for international date and time formats and more.The next thing I am working on for 1.6.0 is to add the ability to modify/split repeating events like the Palm Pilot can do. You will have the ability to modify individual events in a series, the current and future events in a series, or (as before) all events in the series.

To download and get support, visit sourceforge.net/projects/gcalendar-nuke.