iCalendars
You can subscribe to Episcopal High School of Jacksonville calendars using Apple's iCal and Google's calendar.
You only need to follow these steps once for each calendar you subscribe to and then all changes to the subscribed Episcopal High School of Jacksonville calendars will show up on your iCal or Google calendars.
Mac users using iCal and Safari: Click on the link for the calendar you'd like to add to iCal. iCal will open and prompt you to add this calendar to an existing calendar or to create a new calendar. From the popup menu, select New Calendar.
The new calendar will appear in the list of calendars at the left side of the iCal window. To change the color of the calendar, click on the name of the calendar at the left. From the View menu, select Show Info to see a panel with options including color and the frequency with which iCal checks for calendar updates.
Instructions for adding iCal feeds to Google Calendars here