In this video I show you how to enable the top sekret feature (or rather the debug menu) that allows you to choose from 7 (default), 14, 21 and 28 days in week view.
1. Copy past the following command into terminal to enable Debug menu:
defaults write com.apple.iCal IncludeDebugMenu YES
2. From the debug menu in iCal browse to Top Sekret > Days in Week View > 7 / 14 / 21/ 28
Enjoy your new extended weeks in iCal!