Every activity in Eduflow can have deadlines attached to it. You can specify two times:
When the activity opens
When the activity closes
Where to set it
When you are looking at an activity as an instructor, click to edit it. When editing the activity, scroll to the bottom of the settings page to locate the box called "Opens at & deadline".
To specify deadlines, toggle the setting to be "On". Now you can add an "open date" and a "deadline". You can add either or both.
The time for the deadline is set in either 24-hour format or 12-hour format. That format can be changed in your user settings.