hbe02

hi all,
it is to my knowledge that the timer component or class is used like some kind of count down timer that triggers an event. Now how can i instead trigger an event(function) at a certain time or date. like calender event. on 22/12/2009 at 11:00 am.
can this be done in an even triggered environment.. cause i can think of a very inefficient way of polling at every 5 minutes or so... but that is very wastefull!