You can achieve your desired result by using the ScheduleView's special slots functionality. With special slots you can define special slots and style them to your liking. For info on how to use special slots you can take a look at this section of our documentation: ScheduleView | Features | Special and ReadOnly slots. You will also find a step-by-step guide on how to create non-working hour slots in it.
I have also attached a working example of a ScheduleView with non-working hour slots so that you can also see how it works in action. Please have a look at the provided resources and let me know if this is what you were looking for.
Regards, Krasimir Balchev Progress Telerik
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