Using your iphone, open the camera app and hoover over the image the QR code to the left to add the swim and dive calendar directly into your ical to be kept up to date with all events 

If you are a google calendar user, use this calendar ID to add the Swim & Dive calendar into your google calendar: guhsd.net_o40s9cjvglticcivbjru2gas8c@group.calendar.google.com