Execution windows are configured time periods in which a schedule can execute tasks. For execution windows that may need to be used by several tasks, you can create named execution windows to avoid configuring them each time you configure a new task, as opposed to creating the execution window within the task itself.
When changes are implemented to named execution windows, they affect all tasks the execution windows are assigned to. Execution windows configured within tasks are only specific for that task.
To create an execution window: