Thank you for writing.
does not support the desired functionality. However, it seems quite reasonable and for this reason I will add it in our Public Issue Tracking System
as a feature request. Feel free to add your vote for it here: http://www.telerik.com/support/pits.aspx#/public/winforms/11878
Your Telerik Points
have been updated as a token of our gratitude.
Meanwhile, please refer to the attached project where I tried to implement something similar - I am hiding the undesired hour cells.
Let me know if you have any questions regarding this matter.
All the best,
the Telerik team