dhtmlxScheduler - Hours shown on the calendar

Is there a way to only show say 8:00 to 17:00 on the day and week views? Can it be done much like the w-week example in the docs? I would like a tab that showed only Monday through Friday from 8am to 5pm.

You can configure start and end hours as
scheduler.config.first_hour = 8;
scheduler.config.last_hour = 17;

It will affect all view where time scale is used.

It seem to subtract one from the last_hour parameter.  If you specify 17, it shows to 16.  That might be expected as it might mean to show “Up to” 17:00 and not mean show 17:00 inclusively.

Yes, it is expected behavior, last_hour sets the top limit, so if you need to have 17 as selectable hour, you need to use last_hour = 18;