restore calendar to all devices

Hello Cjkvero,

We understand your calendar events are missing since updating the software. We'd be happy to help!

If there hasn't been any changes in your accounts since updating the software, we'd like you to check out the following article for troubleshooting steps: If your iCloud Contacts, Calendars, or Reminders won’t sync.

If the issue continues, let us know.

Thanks for using Apple Support Communities. Have a good one!