A great feature to add to the Appointments plugin is to limit the hours of work to those worked on a specific day. Example. Normal private karate classes for our school run 5:30-7:30 PM M-Th and Saturday 9 Am until noon. The plugin displayed daily hours form 9 am until 7:30 PM, with off course the available hours in green. This was confusing to our students. We made the follow modification and would love to see this as a feature (even one that can be turned on or off). This was a great way to handle hours seperate from available days.
created new CSS Class
Changed 2727-2728 from notpossible to nothour.
else if ( !$this->is_service_possible( $ccs, $cce, $capacity ) )
$class_name = 'nothour;