In sudo vim /etc/php/7.0/apache2/php.ini
change date.timezone to Europe/London
in
vim /etc/apache2/conf-available/zabbix-frontend-php.conf
uncomment two lines
php_value date.timezone Europe/London
and restart
sudo service apache2 restart
WebSavers – Partnered Hosting Provider – Domains, VPS, Managed Servers and more