
The alarm clock works even if you set the power off. If the alarm time is reached while the phone is switched off, the phone switches itself on and starts sounding the alarm tone.
If you don't need your alarm clock on your day off, you set it to alert only on selected days of the week. Set the phone to alarm at a desired time. Select Menu > Organiser > Alarm clock and choose the days by selecting Repeat > On, Repeat days.
You can pick any of the ringing tunes in your phone as your alarm tune by choosing Alarm clock > Alarm tune and selecting the wanted tune.
Set the phone to auto-update the time & date to the appropriate time zone: select Menu > Settings > Date and time > Auto-update of date & time.