I'm getting a strange error when my booking form comes up with a calendar for a service with a long duration. Both the employee and the company have 24 hour a day availability, and the service is supposed to be 24 hours long. But when the calendar comes up, I get an error. Under month is says Invalid Date, and under time it says NaN. And it shows no availability. Screen shot attached. 

What am I doing wrong? How can I address this very important need for 24 hour long appointments? Or do I need to add some code somewhere?

Thanks so much for your help, this product is invaluable!

Please ignore. Issue identified as PEBCAK (Problem exists between chair and keyboard)

I had my calendar blocked off. It seems to work great now.