My calendar isn’t the same on any of my apple devices
My calendar isn’t the same on any of my apple devices
[Re-Titled by Host]
iPhone XS Max, iOS 12
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Get help using iCloud Contacts, Calendars, or Reminders - Apple Support
You essentially have to make sure you are using the same account as the default on every device. Follow the instructions in that link and if you have trouble please let me know so I can give more instructions.