It looks like on the Academics > Class > Bulk Update function, there are a couple of "Update" buttons missing. The one we would use (and so that we noticed!) is the "Surveys Visible End Date Override" - so we can add bulk Start Date Override values, but not End Dates.
I just directed this bug to the developers.
Thanks for reporting,
GNECsis Spanish and Portuguese Support Specialist
That update actually works for all three of the date fields. Any of those that are filled in will be updated when you click update. If you leave them blank, nothing will change. I will change the alignment of the fields to make that more clear.
Senior Software Developer
Global Ministry Center - Church of the Nazarene