If you are using a theme for your Clearspace instance and you change the date/time locale for Clearspace but notice that date/time values are not displaying properly, check out the theme.xml file in the theme folder.

The theme.xml file can be found in your JiveHome directory under themes/<theme-name>/theme.xml.

Open up the theme.xml file in your favorite editor and look for a <locale> element.  Inspect the value of this element to make sure it matches the locale that you want and change it if necessary.  Note that if you change the value, you will need to restart your appserver for the change to be picked up.

This should correct date/time display values.