The need for custom date range is very strong for most b2b scheduling needs. There's no need to show Weekends when the business is closed. That's the majority of businesses in b2b. Not having this feature means there's wasted space taken up for days that cannot be scheduled. 

Our use case is as follows.

We use the kendo scheduler for AngularJS with a custom view based on the timeline month view, providing the ability to show every Monday between two dates chosen by the user. Those Mondays are representations of weeks, so our timeline effectively shows (many) weeks in a condensed fashion. I was able to accomplish this by extending (jQuery-wise) the TimelineMonthView object and overriding the calculateDateRange function. This function then builds an array of (only) Mondays.

It would be really nice being able to build custom views or at least specify alternative date range calculation logic.