Go to Settings.
Go to Accounts & Passwords. For iOS 14 or newer, go to Calendar instead.
Go to Add Account.
Go to Other.
Go to Add Subscribed Calendar.
Enter the iCal URL retrieved from Blueprint and select Next. You can find more information on the iCal URL here.
Edit the description to change the calendar name and select Save.
Go to your calendar and select the calendar(s) you would like to view