Keep your Calendar up to date with iCloud Apple Support
Default Iphone Calendar. Select the calendar that you want to be your default. Web tap default calendar.
Open the settings app on your iphone by tapping on the gear icon on the home screen. Select the calendar that you want to be your default. Web tap default calendar.
Open the settings app on your iphone by tapping on the gear icon on the home screen. Web tap default calendar. Select the calendar that you want to be your default. Open the settings app on your iphone by tapping on the gear icon on the home screen.