Google Calendar

1. Copy the URL at the bottom
2. Go to calendar.google.com
3. Click the + above My calendars and choose From URL
4. Paste the URL into the 'URL of calendar' field and click 'Add Calendar'
5. After a few seconds Events should show up in your calendar

Microsoft Outlook

1. Copy the URL at the bottom
2. In Outlook, click 'Open Calendar' and choose 'From Internet…'
3. Paste the URL into the dialog and click OK
4. Click Yes

Apple Calendar

1. Copy the URL at the bottom
2. In Apple Calendar, click the 'File' menu and choose 'New Calendar Subscription…'
3. Paste the URL into the dialog and click 'Subscribe'
4. Set Auto-refresh to 'Every hour' to keep your calendar up to date
5. Click OK

Most calendar applications support the so-called 'iCalendar' or 'ICS' format.

The URL at the bottom exposes such a file.

In your calendar application, please find the option to add iCalendar or internet subscriptions and paste the URL