LIACS Calendar - this page shows internal staff calendar of the Leiden Institute of Advanced Computer Science (LIACS), the computer science department of Leiden University. Note that not all events are public.
To add this calendar to your own calendar, you can add this platform-independent .ics URL to your calendar client:  https://calendar.google.com/calendar/ical/csliacs%40gmail.com/private-9ea6e69e845a61bb47a584f0ab9bdd39/basic.ics