[u8myfoood]

It would be quite hard to write considering anytime you soft reset the phone, all the previous count down data would be lost, at that rate, just use the calender application with an alarm to alert you at the time specified. Any other specific program other than calender apps would be quite useless at that task simply due to the large countdown and might create an overflow error if the time is too far apart, at least that's my understanding of the situation.