Events that last multiple days and overlap can be attended as long as travel times between the locations can be reasonably handwaved. Also, for example, when a player plot happens on the 25th in-game and a quest on the 30th, both can be tagged on the same day in real life. If the events are occurring at the exact same point in time in-game, then the character would not be able to attend both of them. We will notify the playerbase when two events will be happening simultaneously.