Notification Center allows you to turn off notifications for an alarm. When you turn off notifications, you will no longer receive any type of notifications for that specific alarm type. Choose to turn off notifications temporarily (1 or 8 hours) or forever. This is a personal setting; when you turn off notifications, other users will continue to receive notifications.
When you turn off notifications for an alarm, a personal rule will be created automatically. If you want to make this undone, remove the relevant rule. See Set up rules. The rule for a temporarily turned-off notification will disappear automatically when the time has elapsed.