Every Web site (both top-level Web sites and subsites) can be customized to use specific regional settings that are used as the default settings for all users of your site. Individual users can also choose to use these default settings or specify their own personal settings. As a site owner, you can specify the following regional settings for your sites:
Locale This setting controls how locale-specific information, such as numbers, dates, time, and calendar settings, are displayed on the site. The default values for all of the other regional settings (listed below) are based on the locale that you choose. When you change the locale setting for a site, all other regional settings are set to the default settings for the new locale. After selecting the locale you want, you can then change these other settings as you want.
Sort Order This setting controls the sort orders that are used for lists and libraries.
Time Zone This setting controls the time zone for the Web site.
Note: Server administrators and site collection administrators can also specify a default time zone for all sites in a Web application. This site-level setting overrides the setting at the Web application level.
Set Your Calendar This setting specifies the type of calendar that you want as your primary calendar. You can also choose whether to display the week of the year, where 1 represents the first week of the year and 52 represents the last week of the year.
Enable An Alternate Calendar This setting enables the settings of an optional calendar to be added to the calendar that you set for your site.
Define Your Work Week This setting specifies which days of the week make up your work week, the first day of each work week, and the first week of the year. You can also specify the start and end time of work days.
Time Format This setting specifies whether to display the time in 12-hour or 24-hour format.
Note: Depending on what locale you selected, you may be able to select only the 24-hour time format.
Change the regional settings for a site
Do the following on each SharePoint site on which you want to change the default regional settings:
Open the site on which you want to change the default regional settings.
On the Site Actions menu , click Site Settings.
Note: On a site for which the Site Actions menu is customized, point to Site Settings, and then click the settings that you want to view.
On the Site Settings page, under Site Administration, click Regional settings.
On the Regional Settings page, select the settings that you want for this site, and then click OK.