it should be appearing in year 3 chapter 2 if you didn't get it it mostly cuz you did have an event going on and you did pass the year 3 to 4 or more without completing the event that you are having in that time so when you finish the event and you are far from the year that the event should appear you will get the another event from the year and exacts time you are in your only choice is to wait until they appear again it might take a long time to rerun again. that why i recommend people to play there event right away if they have it so if there any event would appear in the future will appear if you have an event and you are doing the story you may trigger some event but they will not shown cuz you already have an active event that you didn't finish yet