date(): It is not safe to rely on the system's timezone settings.

date(): It is not safe to rely on the system's timezone settings. You are *required* to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'Asia/Chongqing' for 'CST/8.0/no DST' instead [dashboard.php:30 → require_once() → date() in /usr/share/zabbix/include/page_header.php:175]

解决方法：

在php.ini里加上

date.timezone = "Asia/Shanghai"