Hi. Lisa here and I'm going to show you how to share a calendar that you have on your iPhone. First, your going to go to your calendar and once you're in there you're going to tap on "calendars," that middle button on the bottom. Now, we'll scroll down to the calendar that we want to share, and next to the name of the calendar you'll see a little "i" in a circle.
When you tap on that, you're going to see the option for "Shared With" and to add a person. So, we tap "Add a Person." Now, we can type in the email of the person you want to share it with and now, it will email them an invitation to share that calendar with you. And it's as simple as that. Once they accept it, they will be able to view that calendar and any changes and edits you make to it. And that's it. That's how you share an iPhone calendar.