If you would like to schedule your task to become visible to students at a specific time and date, select Schedule using the down arrow next to Create task on the task editor.
Add a scheduled due date and time
The default is set to tomorrow at 8 am. To change this:
Under Date click the calendar icon.
Select a date on the calendar.
Make sure your scheduled date is before the due date.
Under Time click the down arrow.
Select a time.
Click Schedule.
Once the scheduled time comes, your students will receive an email notification and the task will appear on their Tasks page.