Subscribe your Google Calendar to the built-in eCatholic Calendar
Here is how you can subscribe your Google Calendar to the calendar in your eCatholic website.
Go to your site's master calendar
Go to yourdomain.org /calendar. Once there, look in the upper right corner of the calendar. Locate the icon with the calendar and arrow that is generated by your eCatholic master calendar (pictured below).
Copy the link's URL
You do not need to access the .ics file directly; you simply need the URL. Click on the calendar icon in the top-right of the calendar. That will drop-down a menu with 3 options. Right-click on the Sync to my Calendar and copy the link's URL.
Go to your Google Calendar and add the .ics URL
Log in to your Google account to access your Google Calendar. Then, click on the drop-down menu to the right of Other Calendars. Select the Add by URL option.
Finally, paste the URL you copied in Step 2 into the URL field. Click Add Calendar and you should be subscribed to your eCatholic calendar.