Hi Martin
Thanks for the extra details on your requirements - I will address each one below,
- The Calendar does not support a weekly view only monthly and daily . This would need to be added as a feature request outlining the use case for weekly views.
- In each seminar settings there is Calendar options > Calendar display settings select Site so the seminar date only appears on the Site calendar. You may also want to untick 'Show entry on user's calendar' to prevent duplicate event showing on the calendar.
- When you click on an Event in the calendar the other events for the day view displays details of other events on the day.
Another alternative is to create a seminar report (probably using the seminar session report) and adding a filter for session start and filter by ' is between start of today and 7 days after today' Save this search.
Then use the Report table block with the saved search and add to the page you want this to appear in
Regards