oopic programmable clock

Hi All,
I ordered my first oopic and I wonder if I can do the following.
I want to a device that must have a real time clock to trigger an
alarm signal during five weekdays at 03:00 am and the weekend days (Friday and Saturday) at 04:00 am.
This is the basic task.
The other issue is that if I have a holyday during in any of the weekdays I need to have the alarm, on the previous day at 04:00 am instead of the normal 03:00 am.
It seams to me that the best way to do this is to have a year calendar table and point to every single day which time the alarm should trigger, example:                  Day            Alarm        Holyday         01/01/2004        03:00        No         02/01/2004        03:00        No         ..                     14/01/2004        04:00        No 15/01/2004        03:00        Yes
and so on until the end of the year.
I wonder if I can accomplish this with the oopic.
Another issue is to know if I can have more than one yer calendar.
Does the oopic have a accurate RTC?
I ask this because if I could do this with the oopic or any other device I will need 1000 devices that must run independently but I will need that all of them must have the same date and time to avoid to many time differences among them.
Can anyone give me hand on this?
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