Google, Outlook, Office365 Calendar
1. Click the plus next to "Other calendars"
2. Select "From URL"
3. Paste in the copied URL link and click "Add calendar" button
1. On the menu, click "Open calendar" and then select “From Internet…”
2. Paste in the copied URL link and click "OK" button.
1. Select "Import calendar" from the calendar sidebar
2. Click "From web"
3. Paste in the copied URL link, name the calendar and click "Import" button.