Locale Tab:

Language: English is the Language that is installed when a Joomla! web site is first created. It is set as the default Language. If a Language other than English is required the Language files must be installed first using the Language Installer - menu=>Installers=>Languages. See Install new Language - Site. Select the required Language from the drop down list.

Time Offset: Identifies the time zone in which the web site is to operate. The time offset is set in hours +/- between the web site location and UTC (Universal Time Coordinated - formerly referred to as GMT (Greenwich Mean Time)). Select the time zone from the drop down list.

Server Offset: Shows the number of hours between the time zone indicated in the Time Offset field above and the timezone in which the server itself is operating. This is a calculated field and cannot be altered. This offset is automatically applied by Joomla! to the Creation Date, Start and Finish Publishing criteria, amongst others.

NOTE: For example, suppose your server is physically located in New York and its system clock is set to local time (UTC -5), but you want your web site to show local times for the majority of your visitors who are in Los Angeles (UTC -8). Then you would select UTC -8 from the drop-down Time Offset field. This would automatically calculate the Server Offset to be -3, the difference between -8 and -5.

Country Locale: Enter the location code of the web site. For instance en_GB is the Language (en) and country (GB) code for the UK.