To add an alarm:

Choose Alarm > New. A new alarm will be inserted into the alarm list and selected.

Set up the alarm date. Alarms can be one-time alarms or they're recurring weekly.
For a one-time alarm, uncheck Weekly . You can then enter a specific date or use the button to set the date to the following day.
For weekly recurring alarms, select on which weekdays the alarm should go off by toggling the respective buttons.

Set up the alarm time. The alarm will go off at that time on the next day that matches the date you set up in the step above. Aurora will wake your Mac at alarm time unless you uncheck the Wake Computer checkbox. Please note that no alarm can go off when your Mac is sleeping and this checkbox is unchecked and that you can't set up alarms to go off in less than 60 seconds.

Set up which iTunes playlist or EyeTV channel should be played at alarm time by selecting the playlist or channel from the pop-up menu. You can also specify if the playlist should be shuffled or if the TV channel should be played full-screen.