Lost all calendar events on iPhone after iOS 18.5 update

I Updated my iPhone to 18.5 and my calendar events are completely gone. I have tried everything and contacted Apple multiple times. Right now, I am currently using an old device to see if I can use an older iCloud backup to get the events back. I tried one backup, and it didn’t work, so I am working on another older backup to see if that will work. If not, then I have no other options. There was no restore backup on iCloud.com for the calendar either; it seemed to have deleted as well. There was definitely a glitch in their recent update, as I have checked on Reddit, and Apple said a lot of users are contacting them about this. I use my calendar for everything, and it’s all gone.


[Re-Titled by Moderator]

Original Title: Calendar Events wiped out

iPhone 13 Pro, iOS 18

Posted on Jun 15, 2025 9:07 AM

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45 replies

Jun 16, 2025 9:35 AM in response to Dej1001

Dej1001 wrote:

I Updated my iPhone to 18.5 and my calendar events are completely gone. I have tried everything and contacted Apple multiple times. Right now, I am currently using an old device to see if I can use an older iCloud backup to get the events back. I tried one backup, and it didn’t work, so I am working on another older backup to see if that will work. If not, then I have no other options. There was no restore backup on iCloud.com for the calendar either; it seemed to have deleted as well. There was definitely a glitch in their recent update, as I have checked on Reddit, and Apple said a lot of users are contacting them about this. I use my calendar for everything, and it’s all gone.

[Re-Titled by Moderator]
Original Title: Calendar Events wiped out

If you were truly syncing your calendar to icloud and not an email account then you would recover by doing this Restore your calendars and events on iCloud.com - Apple Support

Since calendar are synced it's not part of the backup What does iCloud back up? - Apple Support

Jun 20, 2025 8:30 AM in response to Omgitsparkles

Omgitsparkles wrote:

Same thing happened to me. I sync my calendar to my iCloud, yet when I tried to restore an older backup, it didn’t show any. This happened to me several years ago as well. I freaking hate apple right now!! They need to stop rushing all these updates.

Sorry syncing to icloud and restoring from icloud backup are two different things.

You sync icloud data to the cloud therefore it isn't part of the icloud backup.

If you followed that link I gave to the OP and if you truly were syncing to the cloud it would restore it for you.

Jun 28, 2025 9:53 AM in response to razmee209

Correct. Syncing to iCloud and restoring from iCloud backup are two different things. You can still sync your calendar and reminders to the iCloud (to share across different devices using the same iCloud account) and also still have the option to restore your phone from an older backup with all of that synced calendar and reminder information included in those older backups. My older backups are gone. I didn’t delete them, yet they are all gone.

Oct 5, 2025 11:07 AM in response to Dej1001

Wife has a iPhone 15. Noticed this on the iOS 18.6 update. Could have been before.. not sure. Her entire iCloud Calendar wiped.... She is not one that tweaks her settings. They stay the same. I just bought a 17 (in the past week), not sure how it would be relevant or not, but I have no issues with my calendar. So far, only Calendar issues.

Nov 6, 2025 9:26 AM in response to Dej1001

I too am shocked and very frustrated by this happening. I just found this support page! Thank heavens! Ive been talking to Apple Support and even to my local Apple troubleshooter to rectify all of my information from the past years!! To NO AVAIL!!! I only have 6 months of backup now and have not had any success in retrieving my history. Im so angry. Apple has done us ALL a terrible disservice doing this!! What is my recourse? HELP PLEASE!!!

Nov 18, 2025 6:27 PM in response to Charles Palenz

Charles I beg to differ with you re deleting calendar being a user misstep! My personal experience has involved the senior techs last month both in person and on the phone over a two week period. All I spoke with were not at all familiar with my issue, could not find a reason why this happened and after trying all methods you suggested we’re unable to resolve this problem. Very frustrating and discouraging to me re Apple!

Nov 24, 2025 3:55 AM in response to Dej1001

Devastating! My Calendar was synced between my iphone 13 and my macbook, but my reminders weren't. On my phone, I turned on sync for my reminders, and I selected the 'merge' option given. Then my phone automatically gave me the same 'merge' screen for Calendars (even though they should have been synced) so I selected that. I opened the Reminders app and it showed a welcome screen, suggesting I update the reminders app 'to unlock its full potential' (lol) so I updated. Now all my Reminders and entire Calendar are wiped. I used restore for the Calendar to a backup from earlier today, but it restored from about 3 years ago!! The Reminders did not even show as an option for restore, and even 'deleted items' is gone in the app, so I can't restore from there. Everything is gone. All calendar events and all reminders. Years and years and years of building dates and lists and efficiencies. FFS. I was actually wondering whether to use google Calendar/Tasks but i thought it would take too long to rebuild and I should stick with Apple. but I guess I'll be changing over now, hey. Very peed off!

Nov 29, 2025 1:54 AM in response to Dej1001

I’m currently experiencing this same issue. I’m not sure what happened but all of my events on my calendar all have been deleted. I had years and years of events on the calendar. I’ve tried just about everything to get the events back but I’m still not having any luck. Anyone figure out how to restore the calendar? It just randomly deleted itself.

Lost all calendar events on iPhone after iOS 18.5 update

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