Defined in github.com/aws/aws-sdk-go/service/rds/api.go
The daily time range during which automated backups are created if automated backups are enabled, using the BackupRetentionPeriod parameter.
Default: A 30-minute window selected at random from an 8-hour block of
time per region. To see the time blocks available, see Adjusting the Preferred Maintenance Window (http://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/AdjustingTheMaintenanceWindow.html) in the Amazon RDS User Guide.
Must be in the format hh24:mi-hh24:mi. Times should be in Universal Coordinated Time (UTC). Must not conflict with the preferred maintenance window. Must be at least 30 minutes.