The Alarm Clock feature will set one time per 24-hour period.

1 Go to the Applications View by pressing the Home button.
2 Select the World Clock app. (If you don't see it select All from the Category pick list in the upper-right.)
3 With World Clock open, select the alarm clock icon in the upper-right corner.
4 Set the time for the alarm and then select OK.
5 To select the alarm's sound, with World Clock open, press the Menu button.
6 Select Options. Then select Alarm Preferences. Select the tone from the pick list and select OK.