You can install an alarm using the following three applications: the World Clock, Calendar and Tasks. An alarm set in the World Clock recurs on a daily basis. An alarm set in the Calendar or Tasks occurs once on a given date and time.
Setting an Alarm in Calendar
To set an alarm for an event in your Calendar, add the calendar entry you want to be reminded of, and set the alarm by checking the Remind me box. You can set the alarm properties by tapping on the alarm icon, then tapping the Reminder Options button. For more information on setting an alarm through the Calendar, see the Help installed on the device.
