Zimbra calendar is great, but it’s not really the place to put your family schedule. Outside calendar services such as Google Calendar are great for this, but it’s nice to be able to see everything at once when you are considering what is coming up in your day or week. If you use an external site like Google Calendar to organize things at home, the following steps will show you how to subscribe to a Google Calendar with Zimbra to see your whole schedule on one calendar.
Please note that this will NOT give you the ability to edit your Google Calendar with Zimbra. It will allow you to view it.