Calendar logic question

I have a calendar application that shows events in a month. I want to add the ability to have re-occuring events. I've been thinking about how to do that, but it's not seeming to be too easy. Say, I have a table of re-occuring events: eventId int eventName varchar eventStartDate date eventEndDate date eventOccuranceType enum(weekly, monthly, daily) eventInterval int eventDOW int Should I populate the actual events table with re-occuring events at insert/update/delete times, or should I code the event listing page to determine if there are events that would occur in the month shown? The first way would be costly at insert time, and may add lots of events that will never occur -- plus one can't go on forever, so at some point, it seems, it would have to do the second way anyway. The second way, is costly at page view time. With a small number of re-occurring events, that probably wouldn't be an issue, but as the calendar usage grows, I can see that becoming resource costly. Is there a better way?