There are two ways you can edit the dates for activities. The first is to go into the settings of each activity individually and change the dates. If you are also changing the title, description/instructions, and other settings of the activity, then you will want to stick with this method. The second way is to use a special report to bulk edit the dates. If you are just looking the change the dates for the activities, this method might help save you some time. Note: Unfortunately not all activity types can be updated using the method. At this time Forum due dates cannot be updated with this report.