You can include a schedule of your live calls inside your group for your clients. 

When you set up the live call schedule, your clients will receive automatic email call reminders 48 hours and 1 hour before each live call starts.

Here is how to set up a schedule of live calls:  

Step 1: Under “My Groups”, click on the “Pages” menu for the group you want to add the live call schedule to, and select "Upcoming Events".

Step 2: Click "Create New Event" button at the top right.

Step 3: Enter the title, date, time, and description of each live call. The description is what your clients will receiving in the email reminders, so you can include any information they need to prepare for the call.

Step 4: Hit "Publish" when you're finished. You can come back and edit your events at any time.