I've integrated the Eventcalendar module (SS2.4) in a site for a local 3D-Conference. Usually there are 3 events in a year. The plan was to set up different calendars for each conference to hold the different calendar events (e.g. presentations, speeches). The first event was in May. So, the events are in the past and are not shown in the calendar. For archiving purposes, i want to show the former events. How do i modify the module to make the calendar stick to a specific date? Or is there a way to filter a global calendar holding several conferences (also with presentations in the past)?