Download Mango Connect app from the Apple App Store on your iPhone or iPad
Open the Mango Connect app.
Log in with your Mango Display account
If the Apple permissions screen for Calendar pops up, authorize access accordingly.
Tap on your display from the list shown in the next screen
Tap on 'Calendar & Reminders' in the next screen and enable the 'Calendar' if necessary.
In your browser log back into Mango Display, you will see your iCloud calendar show in the calendar widget.
👋🏽NOTE: Mango Connect App must stay open in the background in order to receive Calendar updates for your Mango Display