Yes, it is possible to share your Zimbra calendar with other people. You can share it with specific people or make it public, depending upon your preference. Users with whom the calendar is shared can view, edit or manage the calendar based on the permissions you grant. However, the method to share can vary slightly depending on the Zimbra version you are using. Typically, you can do this by right clicking on the desired calendar in your Zimbra Calendar tab and then selecting “Share Calendar”.