End User Dashboard Access after a Deadline (Temporarily Locking the Dashboards Down)

What is the recommended best practice for needing to restrict access (temporarily) to particular dashboards after a specific date? Would modifying the read/write access be the best approach? My use case is that certain dashboards will need to be locked down on a certain date/time and all requests/movement of dashboard data will need to be finalized by that time by end users. Once that specific date/time comes I need to lockdown the end users ability to keep making changes. I would think that just updating the end users read/write permissions for those dashboards would be the best approach but wanted to ask the community if there were other options out there and maybe something that would work better, that I should consider.