You can cancel and uncancel multiple selected events, in bulk, using the "Select an action" drop-down on the List view in your Trumba editing environment.
For more information, go to How to cancel and uncancel events
You can automatically hide or show cancelled events on your published calendars, spuds, and feeds using the built-in Cancelled Event field.
For more information, go to Setting up filters to hide or show cancelled events