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 09:07 AM

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Posted on Jun 16, 2025 09:56 AM

The Apple update 18.5 deleted the “In my phone” iCloud calendar completely the only events that were still there were my email calendar events. The restore on iCloud.com was also deleted. I haven’t had any issues with my calendar until this update it deleted 3 years worth of events.

I used an old iPhone device I had and downloaded an older version of my saved iCloud backup at setup from 6-12-25 which was before the update and I successfully got the calendar events back up. I then had to go through every single day and save each event to my email calendar instead of iCloud so now I have all my events on my current device.

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16 replies
Question marked as Top-ranking reply

Jun 16, 2025 09:56 AM in response to razmee209

The Apple update 18.5 deleted the “In my phone” iCloud calendar completely the only events that were still there were my email calendar events. The restore on iCloud.com was also deleted. I haven’t had any issues with my calendar until this update it deleted 3 years worth of events.

I used an old iPhone device I had and downloaded an older version of my saved iCloud backup at setup from 6-12-25 which was before the update and I successfully got the calendar events back up. I then had to go through every single day and save each event to my email calendar instead of iCloud so now I have all my events on my current device.

Jun 16, 2025 09:35 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 08:30 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 09:53 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.

Jul 1, 2025 10:20 AM in response to Dej1001

It appears it’s deleted mine too, although initially I didn’t put the two together, but I’ve done the update recently (automatically) went to check my calendar today and notice past events are missing.

I’ve tried a few things after reading some guides on here, but alas it hasn’t worked.

I’ve tried searching to see if just not showing but still on iCloud but isn’t finding anything

Jul 9, 2025 04:44 AM in response to Dej1001

I have also updated to 18.5 and noticed all my events that I have catalogued in my calendar have all gone! I have also followed the information online to try to get them back. I have also looked on iCloud to restore but they are all gone from there too, just like others have experienced.


This has all my appointments on there! How else can I get these back as I cannot possibly remember everything that was in there (which is the whole idea of a calendar)!!!

Aug 10, 2025 09:31 AM in response to Dej1001

I had the same issue after updating to IOS 18.5. Whether it’s actually this update, or the deprecation of iTunes (which I always successfully used to sync my Outlook calendars to iPhone/iPad) isn’t entirely clear. Apple have been nothing short of hopeless in “supporting” people.


Here’s what I think has happened to me, and forgive me as I’m no expert. So, I downloaded iCloud for windows. It told me I would sync (“sync” being the important part) my outlook calendars with iCloud, as well as my contacts. The contacts were synced, but the Outlook calendars were wiped clean. 16 years of diaries gone in an instant. Unfortunately, my backup from Outlook calendars were backed up to Windows One Drive. So, when iCloud wiped the calendars, the .pst file for the backup on One Drive was automatically updated to wipe that too.


Unfortunately, I didn’t have a stand-alone backup of the .pst file done recently, and had to revert to the last one I had for December 2024. I’ve managed to rebuild some of my diaries, but it’s a nightmare. I haven’t had the guts to try it again. If the so-called support from Apple senior team so far is anything to go by, it doesn’t inspire confidence. But there surely must be a way to synchronise data between devices and platforms that doesn’t risk losing valuable information we all depend on.


I’m going to reach out to Apple again tomorrow to see if they’ll walk me through an idiot-proof sync, but I’m not holding my breath waiting for success. One thing’s for sure, I’ll have several backups of the .pst file on several stand-alone drives before I do anything!


Any other ideas or comments welcomed.

Aug 27, 2025 11:49 AM in response to Joycemreinhart

I have repeatedly been trying to respond but the system just kept sending me back to sign in. I’m trying again in the hope it gets posted. Apple still don’t have a solution. Arranged another call back for yesterday at 3.30 and they didn’t call. They clearly want to ignore people affected by this massive mess. If this gets posted, I’ll then set out the workaround I’ve managed to put together myself, but a separate backup is essential for this.

Lost all calendar events on iPhone after iOS 18.5 update

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