When using the latest stable jQuery UI themes (1.8.10) with Yii 1.1.6 (which uses 1.8.6) the widgets don't appear (they're invisible but they're there). In order to make them visible you need to change the following line:
MrFisk is a sleek little bot hanging out in the official #yii IRC channel on freenode, meant to serve Yii users with documentation lookups and other things. This document intends to provide a summary of what MrFisk can do for you and how to use his fin^H^Heatures.
You would find having such a need in most Yii Projects. Your database needs a specific format to store date fields, while you may want to display it in different formats to the users on forms and other views.