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iPhone Calendar Not Syncing? Here are 7 Fixes

Many users rely on the stock Calendar app in iPhone to create or schedule appointments, meetings, tasks, dates, reminders, etc. If you have multiple iOS devices, or if you want to switch to a new iPhone, you may want to have all the iOS calendar events synced. However, sometimes the application doesn't work the way it should be. Many people encounter problems like iPhone calendar not syncing, iCloud calendar not showing up on iPhone, etc. If you have similar problems, the tips in this article will be helpful.

iphone calendar not syncing

Why Is My Calendar Not Syncing with My iPhone?
Solution 1: Check Your Internet Connection
Solution 2: Restart iPhone
Solution 3: Refresh Your Calendars
Solution 4: Reset Calendar Settings
Solution 5: Change Default Calendar
Solution 6: Check the Date and Time on Your Devices
Solution 7: Transfer Calendars via Coolmuster Mobile Transfer Manually

Why Is My Calendar Not Syncing with My iPhone?

So why does calendar not sync with iCloud? Before we dive into the solutions, let's check some common causes for the iCloud calendar not syncing problem.

  • Unstable internet connection.
  • Didn't use the same iCloud account on the syncing devices.
  • Forgot to enable the Calendars option in the iCloud settings.
  • Not enough iCloud storage.
  • The date and time settings on your iPhone is incorrect.

People also read: iPhone Calendar Disappeared: How to Recover Calendar App & Events on iPhone

Solution 1: Check Your Internet Connection

A stable internet connection is required to ensure the iCloud syncing properly. You can check your internet condition by opening a website on Safari. If you find the webpage loads slowly, here's a tip for refreshing the internet connection:

  1. Head to the Control Center of your iPhone.
  2. Turn on the AirPlane mode for about 30 seconds and then turn it off.

check network connection if iphone calendar not syncing

If you are using the cellular data, ensure that the Calendar is allowed to use the mobile data. Here's how to check:

  1. Open Settings on your iPhone.
  2. Click Mobile Data.
  3. Make sure that the Calendar app is enabled.

Solution 2: Restart iPhone

Sometimes the iOS calendar not syncing issue can be resolved by a simple restart. This is an easy yet effective solution for many small technical glitches of Apple devices.

Follow the steps below to restart your iPhone:

  1. Press and hold the Power and Volume Down button at the same time until you see the Slide to Power off notice appear on your iPhone. (If your iPhone model is iPhone 8 and earlier, press and hold the Power button)
  2. Release the buttons and drag the slider to turn off your iPhone.
  3. After one or two minutes, press the Power button to power on your iPhone.
  4. Launch the Calendar app to see if the issue has been fixed.

restart iphone to fix iphone calendar not syncing

Solution 3: Refresh Your Calendars

Sometimes the calendar not syncing issue is caused by the lags of the application. To refresh your calendars, you can toggle off and on the iCloud Calendars option in the Settings app.

Here's what to do:

  1. Open the Settings app on iPhone.
  2. Tap [your name] > iCloud.
  3. Locate and turn it off the Calendars option, then turn it back on.
  4. Wait a few minutes for all the calendar events to be synced again.

turn off and on icloud calendars if iphone calendar not syncing

If the iCloud calendar still not showing up on iPhone, try to refresh it in the Calendars app:

  1. Open the Calendar app on iPhone.
  2. Tap Calendars.
  3. Pull down the list of calendars.

refresh calendar app to fix iphone calendar not syncing issue

Solution 4: Reset Calendar Settings

If you find iCloud calendar events not syncing with iPhone completely, you can follow the steps here to change the calendar settings:

  1. Open the Settings app on your iPhone.
  2. Tap Mail,Contacts,Calendars or Calendar> Sync.
  3. Make sure the All Events option is selected.
  4. Wait for all events to sync.

show all calendar events to solve iphone calendar not syncing

Solution 5: Change Default Calendar

You may have multiple calendars accounts listed in the Calendar app, such as Outlooks, Google. To ensure that iCloud calendars are placed on your iPhone, set the default calendar account as iCloud.

To change the default calendar:

  1. Open the Settings on your iPhone.
  2. Go to Calendar.
  3. Tap Default Calendar and change the default account to iCloud.
change default calendar if iphone calendar not syncing

Solution 6: Check the Date and Time on Your Devices

Outdated date or time on your devices could result in iOS calendar not syncing. To make sure that the date and time are correct on your iPhone, follow the steps below:

  1. Open the Settings app on your iPhone.
  2. Tap General.
  3. Select Date and Time.
  4. Toggle on the Set Automatically option.

set up automatic date and time to fix iphone calendar not syncing

Solution 7: Transfer Calendars via Coolmuster Mobile Transfer Manually

You can also try another working approach to get your calendars from one iPhone to another. Coolmuster Mobile Transfer is the right tool for you to get the job done. It enables you to transfer data from iPhone to iPhone without iCloud. The transferring process is quick, stable, and internet-free.

Key features of Coolmuster Mobile Transfer:

  • Transfer files from iOS to iOS, including calendars, contacts, notes, bookmarks, books.
  • Move data between Android and Android.
  • Migrate files between iOS and Android.
  • No internet needed during the transfer.
  • Supported OS: iOS 5 and up, Android 4.0 and up.

Transfer calendars from iPhone to iPhone:

Step 1: Download and run Coolmuster Mobile Transfer on your computer, then select the Mobile Transfer mode.

toolbox of mobile transfer

Step 2: Connect the two iPhones to computer using suitable USB cables. Unlock your devices and trust this computer if required. Once your devices are detected, they will be displayed as Source phone and Destination phone. You can click the Flip button to switch the positions.

transfer from ios to ios

Step 3: Click Calendar from the data type list, then hit the Start Copy button to transfer calendars from iPhone to iPhone.

transfer calendars from ios to ios

Final Words

While iCloud is reliable to use, there are problems related to iCloud syncing that occur from time to time. Above are the solutions you can try when your iPad/iPhone calendar is not syncing. If you are looking at an alternative way to sync calendars from iOS to iOS, Coolmuster Mobile Transfer is a solid option. This tool gives you an internet-free way to move all calendars to another device. You can download it and have a try.

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