I spend a bit of time looking for the this piece of code while building time feature on a site this tutorial also helped [Local time zones and locales](http://www.yiiframework.com/wiki/197/local-time-zones-and-locales/]("local-time-zones-and-locales")


```php
<?php echo CHtml::label(Yii::t(PTranslate::CAT_USER,UserPref::PREF_USER_TIME_ZONE),UserPref::PREF_USER_TIME_ZONE);
echo CHtml::dropDownList(UserPref::PREF_USER_TIME_ZONE, UserPref::getValue(UserPref::PREF_USER_TIME_ZONE),array(