A PHP Error was encountered

Severity: Notice

Message: date_default_timezone_set(): Timezone ID '' is invalid

Filename: patient/book_appoinments.php

Line Number: 4

Backtrace:

File: /home/onlifemc/public_html/application/views/web/modules/patient/book_appoinments.php
Line: 4
Function: date_default_timezone_set

File: /home/onlifemc/public_html/application/views/web/template.php
Line: 6
Function: view

File: /home/onlifemc/public_html/application/controllers/Book_appoinments.php
Line: 517
Function: view

File: /home/onlifemc/public_html/index.php
Line: 316
Function: require_once