By default, the time zone on virtual hosting servers is set to "Europe/Moscow", also known as GMT+3. The time zone is set to GMT/UTC on virtual and dedicated servers. To change the time zone of a site, you need to specify the required time zone in the .htaccess file of your site:

php_value date.timezone Europe/Moscow

A list of time zones can be found here. You can also set the sentry directly in the PHP code of the site, for example:

date_default_timezone_set('Europe/Moscow');