When selected, the canvases that you're either the owner, the assignee, or a collaborator of and have a due date & time will be shown.
Each quarter is a new OKR session. When selected, the initiatives that have a due date & time in that OKR session will be shown.
All the projects in this organization will be listed. When selected, all the canvases in that project that have a due date & time will be shown.