Fix missing timezone.

src/deb/php/php-fpm.conf

@@ -33,3 +33,4 @@ php_admin_value[upload_max_filesize] = 512M
 php_admin_value[max_execution_time] = 600
 php_admin_value[max_input_time] = 600
 php_admin_value[session.save_path] = /usr/local/hestia/data/sessions
+php_admin_value[date.timezone] = "UTC"