During the main Event, you can also take part in shorter mini-events. They feature themed tasks that help reach the Event objectives. These mini-events are the easiest way to earn event currency:
You can track game events on the Calendar in the News Window, which can be accessed via the Bulletin Board on the map.
All mini-events start and end at 08:00 local time, except for the last mini-event, which ends together with the main Event at 00:00.