Freeze Windows and Maintenance Windows are inherent parts of conflict detection.
Freeze windows allow you to configure the time during which normal change activity should not be scheduled, whereas the maintenance window allows you to schedule a time to deploy the changes. You can view the freeze/maintenance schedules that match/conflict a change from the change details view.
In the change details view, Scheduler is introduced to display all the freeze/maintenance schedule and change/release schedule configured for a change. In case of schedule conflicts, you can edit the change/release schedule or freeze/maintenance schedule based on your access permission.