Symptoms

We can no longer schedule a workflow to kick off at a certain period. There was a feature with the SharePoint 2010 web parts, but that feature is no longer available when using SP2013.
 

Diagnoses

This feature has not been implemented in the K2 for SharePoint 2013 component yet.
 

Resolution 

This feature will be included in a future release of K2. This feature will be aback in the product when we release "Management Pages" in the future. (At the time of writing, there was no ETA yet.)