Alarm

Regular 
Alerts the subject at a specified time in the future, awakening him if necessary. It will also remind him of one thing (in effect, delivering a message), provided he specified that thing at the time the Alarm spell was cast. 
Can be set to “go off” up to a week from time of casting.

Duration: 1 week. 
Cost: 1. Cannot be maintained. 
Prerequisite: Tell Time.

Item 
Jewelry. It will buzz or vibrate at exactly the same time every day, as set by the original creator.  
Energy cost to create: 60.