Current: When tickets are approaching the due date, there is no "quick" indicator that tells the user when the tickets are due.

Proposed: Have a user-specified threshold criteria for green light/red light/yellow light indicator to mark tickets as they are approaching. Something similar to:

* Green: Due date is 2 weeks or later
* Yellow: Due date is within 1 week
* Red: Ticket is late

Nice to have would be optional automatic reminders sent at these times as well.

Having been to the gym, I realise that it could be as simple as something like:

if ($item->due_date <= $unix_timestamp + $red_warning_threshold) { 
    $item->status_colour = 'red';
}