Added clarification to TIME_ZONE setting docs

git-svn-id: http://code.djangoproject.com/svn/django/trunk@1320 bcc190cf-cafb-0310-a4f2-bffc1f526a37

docs/settings.txt

@@ -591,8 +591,11 @@ TIME_ZONE
 
 Default: ``'America/Chicago'``
 
-A string representing the time zone for this installation.
-`See available choices`_.
+A string representing the time zone for this installation. `See available choices`_.
+
+Note that this is the time zone to which Django will convert all dates/times --
+not necessarily the timezone of the server. For example, one server may serve
+multiple Django-powered sites, each with a separate time-zone setting.
 
 USE_ETAGS
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