To add calendar to IOS open your phones setting and under the password & accounts “add account” ,click “other” and “add subscribed Calendar.
Copy and paste this. https://calendar.google.com/calendar/ical/salkeiz.k12.or.us_8erfghvlvgcj5jov3bmiidtp90%40group.calendar.google.com/public/basic.ics
Or open your Iphones camera and scan this QR which will ask you if you want to subscribe to the football calendar.
*subject to change