Google Calendar — On a computer, right-click the Scoutbook iCal Link below and copy its address. In Google Calendar, choose Other calendars (+) → From URL, paste the link, and select Add calendar. Updates may take up to 24 hours.
Apple Calendar — Tap the Scoutbook iCal Link below on iPhone or iPad, or choose File → New Calendar Subscription on Mac, then subscribe.
Outlook — Choose Add calendar → Subscribe from web, paste the Scoutbook iCal link, and save.
Other calendar apps — Look for Subscribe by URL, Add calendar from URL, or Internet calendar, then use the Scoutbook iCal link.