It is a prearranged alerts or reminder in order to wake someone up.

Location:
eZee Frontdesk >>  Tools & Utilities >> Wake up Call

User Privilege:
Can see Wakeup call Popup

How to Access:
Follow below steps to set wake up call:

Note: Wake up call is working on real date time (Not based on software date & time)

Screenshot 1:
New >> Enter title/message >> Select Date & Time >> hit on schedule button.

Screenshot 2:
Screenshot 3: