Default value: 23:59:59
maxTime extra option can be set to define a required ending point in time (hours/minutes) on calendar.
By setting this value, the calendar will adjust its ending hours to this value, hiding all the later hours from the interface.
When inserting and changing events, it will also automatically validate if ending time of the event is valid.
Usage (on Extra Options field) example:
maxTime=18:00:00
maxTime automatic validation: