The Upcoming events block displays future events in a summarized list. The number of days in advance is determined by the calendar_lookahead setting.
Events are generated directly from the calendar and/or activity deadlines, providing a link to full details or directly to the activity.
There are also links to Go to calendar... and add a New Event....
If you click on a date, you will go to the day-view calendar for that day. If the title of the event is a link, and you click on it, you will be taken to that event.