To Subscribe to the Region 65 Calendar, in your Google Calendar Settings, subscribe to [email protected]

To add Region 65 Calendar to your Mobile Phone:
Navigate to this page on your mobile device (Calendars/Mobile Calendars)
Copy this URL: 

https://www.google.com/calendar/ical/ace65calendar%40gmail.com/public/basic.ics

Open iPhone Settings > Passwords and Accounts > Add Account > Other > Add Subscribed Calendar
and paste the copied URL.