Pesan Error Lokomedia Ci Setelah di hosting

Assalamualaikum Warahmatullahi Wabarakatuh...
Para Master Mau Tanya Cara Mengatasi pesan Eror Setelah pasang di hosting Cms Swakalibata_ci 
ini pesannya:
A PHP Error was encountered
Severity: Warning
 
Message: 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 the timezone 'UTC' for now, but please set date.timezone to select your timezone.
 
Filename: libraries/Email.php
 
Line Number: 980
 
Backtrace:
 
File: /home/noonasty/public_html/smp/index.php
Line: 294
Function: require_once
 
A PHP Error was encountered
Severity: Warning
 
Message: 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 the timezone 'UTC' for now, but please set date.timezone to select your timezone.
 
Filename: libraries/Email.php
 
Line Number: 985
 
Backtrace:
 
File: /home/noonasty/public_html/smp/index.php
Line: 294
Function: require_once