If you have duplicate events on your iCloud Calendar
If you see duplicate calendars or events on your iPhone, iPad, iPod touch, Mac, or PC after you set up iCloud Calendar, follow these steps.
Unsubscribe from calendars on your iPhone
Hide and unhide calendars on your iPhone, iPad, iPod touch, or Mac
To hide and unhide calendars in the Calendar app on your iPhone, iPad, or iPod touch:
Select or deselect the calendar’s checkbox in the Calendar list to show or hide a calendar’s events.
To hide and unhide calendars in the Calendar app on your Mac:
Select View > Show Calendar List.
Select or deselect the calendar’s checkbox in the Calendar list to show or hide a calendar’s events. To show or hide events from all calendars, press the Command key while you select or deselect any calendar’s checkbox.
Hide and unhide the Holidays and Birthdays calendar
To hide and unhide Holidays and Birthdays in the Calendar app on your iPhone, iPad, or iPod touch:
Tap Holidays and Birthdays to include national holidays and birthdays from Contacts with your events.
Select or deselect Show Holidays or Show Birthdays calendar.
To hide and unhide Holidays and Birthdays in the Calendar app on your Mac:
Select Calendar > Preferences, then click General.
Select or deselect Show Birthdays calendar.
If you see multiple birthday events for a contact on your iPhone, iPad, or iPod touch, check if you have more than one contact card for that specific person. Open the Contacts app, tap the Search field at the top, then enter the contact's name. If you see multiple results for the same contact, tap the contact, then tap edit to manage, delete, or consolidate their contact information.
Delete local calendars on your Mac or Windows PC
To delete local calendars on your Mac:
In the On My Mac section, click the calendar that you want to delete.
You can delete the calendar in two ways:
Choose Edit > Delete.
Right-click and select Delete.
To delete local calendars on your PC:
In My Calendars on your PC, right-click the calendar that you'd like to delete and choose Delete Calendar. Outlook won't let you delete the default Calendar, but you should be able to remove other calendars that you have permission to delete.
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