I have a customer who requires to be able to create events from the lightbox with a duration that can only be 2 hours, 2.5 hours, 3 hours, 3,5 hours and 4 hours. While there are not strict limitations on the starting time of this lesson.
What I would like to achieve then is that the ending time dropdown shuld only contain the ening time that are compatible with the requested durations.
For example if the lesson starts at 8am, end time sropbox should only contain 10:00, 10:30, 11:00, 11:30, 12:00.
Is that possible and how?