Having the Glenoaks events on your personal calendar is a valuable tool to keeping yourself on top of all that is going on with the school. (Google calendar will put it on your personal calendar in a different color so that it quickly stands out as from a different calendar.)
Here are the instructions for adding the Glenoaks Calendar to your Google calendar or Apple Calendar.
Write down or copy the URL for the Google Calendar you want to add to your iPhone. (Glenoaks URL: https://calendar.google.com/calendar/ical/glenoaksweb%40gmail.com/public/basic.ics )
Tap the "Settings" icon, then scroll down and select "Calendar" then select "Accounts"
Tap "Add Account" and select "Other."
Select the "Add Subscribed Calendar" option, fill in the Google Calendar URL https://calendar.google.com/calendar/ical/glenoaksweb%40gmail.com/public/basic.ics in the Server box and click "Next." Change any settings you see fit before saving the calendar. You do not need a username or password.
Toggle your view of the subscribed calendar by opening the Calendar app and tapping "Calendars" in the upper left corner. Tap a calendar name to either display or remove calendar events.