The open date is the date and time when your program's application will open and applicants can start applying.
The visible deadline is the date and time that applicants will see. If you leave this blank, your deadline will be listed as “Rolling”.
The start deadline is the date and time in which no new applications can be started.
The hard deadline is the final cutoff deadline. No applications can be submitted after this date. Setting a hard deadline after your visible deadline is a way to create a grace period for your applicants.