Calendar

Hi, I'm about to add some simple calendar functions to my application, and I'm thinking of how I should implement recurring events. Are there one standard way most people use that works well? I guess you have some kind of emitter event that creates the recurring events and a group id that holds the events together. How long forward does one usually create the events. Two-three years...? Sorry if I'm a bit blury. But any ideas on recurring events are welcome. I guess I could just hack something together, but it would be fun to do it right. Regards Emil