Fixed iPhone Calendar alert Not Working after iOS 17.3.1 Update in 2024

in short-

  • Make sure Calndaer Notifications are turned on and not set to None.
  • Please check that the calendar Alert Style is set to Banners or Alerts.
  • Ensure that Do Not Disturb is turned off and you’re signed in to your Apple ID. For More, read this article.

Why are my Calendar reminders on my iPhone not working? Apple’s iOS device comes with a built-in calendar app that provides a lot of essential features so beneficial for all. The Calendar app has options to add and set birthday, add Anniversary, Events, and All- day events reminders, besides, you can also sync other third-party apps with the available official Calendar app. there is an easy way to set up Calendar event and its alert, too.

However, Sometimes numerous users encounter issues concern iPhone Calendar reminders not working. Since definitely, we know while the alert has not arrived at the right time on the iPhone screen, then the users will miss their event. So to fix an issue, we come here with potential answers, that would help you to resolve your painful iPhone Calendar notifications running iOS 15 or later problem. Sometimes OTA update arrives with the bug, and so that updating iOS via iTunes/Finder does solve a couple of problems.

You Should try these best Calendar Apps for iPhone.

All Possible Clues to fix iPhone Calendar Alerts Not Working: iPad, iPad Pro, iPod

Fix #1. Make Sure Calendar Alerts isn’t None

You have to need the following given steps carefully to fix iPhone Calendar Alert not working.

Step 1. Launch the Settings App on iPhone, iPad.
Step 2. Tapping Sounds & Haptics.

 Sounds & Haptics Settings on iPhone

Step 3. Now scroll down the screen Tap on Calendar Alerts.
Step 4. Make sure that Calendar Alert Tones switch isn’t None (Mute).

Change Calendar Alerts Sound on iPhone

If switch set None then please choose available other sound tones Or keep continues following Steps.

You can also choose Ringtones for your iPhone Calendar Alerts. Besides, on the bottom of the Calendar Alerts screen, you can see Classic tones, there are wonderful tons such as real Alarm, Bark, Belltower, Blues, Crickets, Doorbell, Duck, Robot, Sci-Fi, Timba and more.

Fix -2 Check out iPhone Calendar Notifications Settings

Please change the Notification Alert style and Sound too.

  1. Launch the Settings app on iPhone.
  2. Tap Notifications.
  3. Scroll down Notifications Style under and tap Calender.
Open Calendar Notifications on iPhone
  1. Turn toggle Allow Notification ON/Green.
  2. Now you can see various sections on-screen including Upcoming Events, Invitations, invitee Responses, Shared Calendar Changes, and Siri Found in Apps.
Turn ON Allow Notification Click Customize Notification And Enable Toggle Upcoming Events, Invitations, invitee Responses, Shared Calendar Changes, and Siri Found In Apps On iPhone

Now, choose one of these to make a change such as Allow Notifications, Calendar Alerts style (on Lock Screen, Alert Show or hide in Notifications Center, Banners Style) Sounds (tap on Sounds and update Settings like vibration, Alert Tones, choose Ringtones as Calendar Alert), Enable Badges to show the number of Alerts on Calendar App icon on Phone or iPad’s Home Screen.

Fix #3. Change Default Alert Times

  1. Launch the Settings App on iPhone/iPad
  2. Scroll the screen Tap Calendar.
 Launch The Settings Scroll The Calender On iPhone
  1. Click Default Alert Times.
  2. Tap Default Alert Time – Birthday, Events, All-Day Events
Click Default Alert Times Tap Birthday, Events, All-Day Events On iPhone

Set your Reminder Time Just before a Day, Birthday Reminder should be on Day, Event Reminder Just Before a day or Event Reminder you can set as of your need.

That’s it.

Fix 4. Adjust Correct Time Zone

Please, set up the current time zone where you are currently living.

‘’According to a piece of information on Apple Site, the iPhone calendar uses your location, locations of upcoming events, and traffic conditions to tell you when you need to leave to arrive on time at your destination. You will not receive alerts for events with destinations that take more than three hours to reach.’’

  1. Launch the Settings app on your iPhone.
  2. Tap Calender.
Launch The Settings Scroll The Calender On iPhone
  1. Scroll down the screen until you see the Calendar label and tap on Time Zone Override
  2. Turn On Turn Time Zone Override.
Click Time Zone Override Enable Toggle Time Zone Override On iPhone

in advance, you should also set up a location-based alert for the calendar App.

Go to Settings App > Privacy > Location Services, then tap an app to turn Calendar alerts ON based on your location.

Adjust Correct Time Zone on iPhone calendar iOS9

Fixes #5. Force Reboot Your iOS Device

Different iPhone modal has different way to force reboot devices; All iPhone users should follow the bottom given steps to force rebooting devices and get rid of the Phone calendar alert issue.

Method to force reboot For All Face ID iPhone models

Press and quickly release the Volume up button, then press and promptly release the Volume down button and in the last press and hold on Side button until you appear Apple logo on the screen. After successfully shutdown the Phone, press and hold on the Side button again to Turn On your Phone back.

Hard Reboot iPhone Step by Step

Method to force reboot iPhone 7 and iPhone 7 Plus users

Let’s Press and hold on the Power button/ sleep-wake and Volume down button at the same time for 10 seconds and turn off your phone. To turn on the Phone press & hold on to the Power button again.

Method to force reboot iPhone 6S and previous iPhone model users

Just press and hold on to the Power button + Home button simultaneously for up to 8 seconds and solve your problem. Don’t forget to press and hold the power button again to turn your iPhone On.

iPhone Calendar Second Alert Not Working 2024

Are you sure you’ve set up the Calendar Second Alert on iPhone? Keep note that the second alert on Calendar is only iCalendar specific feature, meaning it is only Apple’s own Calendar feature.

  1. Launch the Settings App on your iPhone.
  2. Tap on Calendar.
Launch The Settings Scroll The Find Calender On iPhone
  1. Select the Default Calendar.
  2. Choose the On My iPhone calendar as your default.
Click Default Calender Choose Calender On iPhone

iCloud and Google Calendar are the only calendars that support the second alert, whereas Outlook App doesn’t support this feature.

How do I turn off second alert on iPhone Calendar?

Don’t know how to disable the second alert on iPhone Calendar? Let’s see how to do it.

  1. Launch the Settings App on iPhone.
  2. Tap Notifications.
  3. Select Messages App.
Launch The Settings App Tap Notification Scroll The Messages On iPhone
  1. Scroll down the Customize Notifications.
  2. Find Repeat Alert and choose Never.
Click Customize Notifications Tap On Repeat Alerts Choose Never On iPhone

Why does my Calendar Keep Sending me Notifications iPhone?

The situation is even if you haven’t set up the Calendar Alert or Event, but still the calendar keeps sending notifications on iPhone? There are a few things to check to get rid of spam calendar notifications on the iPhone.

Check for Random Calendar Subscription

Step 1: Launch the Settings app on iPhone.
Step 2: Scroll down to the Calendar app and tap on it.

Launch The Settings App Tap Calender On iPhone

Step 3: Click Accounts.
Step 4:
Under Accounts tap Subscribed Calendars.
Step 5: Select US Holidays.

Click Accounts Tap On Subscribed Calenders Select US Holidays On iPhone

Step 6: Choose Delete Account.
Step 7:
Finally are Delete Account.

Select Delete Account On iPhone

Check for Email

  1. Launch the Settings app on the iPhone.
  2. Scroll the screen to tap on Mail setting.
  3. Click Accounts.
Launch The Settings App Tap Mail Click Accounts On iPhone
  1. Select Gmail accounts.
  2. Choose Delete Account the Email Account, if you haven’t added it.
Tap On Select Delete Accounts Choose Delete From My iPhone On iPhone

iPhone shared calendar alerts not working

Enable Notifications for Calendar on

To get the Calendar Notifications on iPhone, your iCloud must be set up correctly. Here’s how to do it.

  1. Go to
  2. Click on the settings cog in the upper-left corner.
  3. Select Preferences.
  4. Look for the Advanced pane and from there choose In-app notifications and Save

Now we’ll see a miscellaneous workaround to fix this problem.

  1. First Check the Apple System Status and make sure Calendar, iCloud and Reminders are live and working.
  2. Update all of your Apple devices, including iPhone, iPad, Mac, MacBook, or whatever you have.
  3. Verify the Date and Time on all the devices.
  4. Check Internet Connection.

iPhone Calendar Alerts not making sound

in case of your iPhone calendar alert sound not working, If your ringer or silent switch is turned on. however, your iPhone still not receiving any sound for your notifications alerts,

Please head to the bottom steps –

Step 1: Launch the Settings App on iPhone
Step 2: Tap Sounds & Haptics.
Step 3: Now Drag the ‘Ringer And Alerts‘ slider all the way to the left, then let go of your finger.
Step 4:
Next, Drag the ‘Ringer and Alerts slider back to the original position.

Open Settings App Tap Sounds & Haptics Click Sound Ringtone On iPhone

That’s it.

Even you set up a reminder on iPhone Calendar but that doesn’t ring, I hope all listed ways guide you to clear the iPhone Calendar Reminder not Working. For more information, you can read Apple’s document Get the sweet and sober guide. And share your feedback on our site. Thanks in advance.

Last sort- You guy after attempting above all workarounds, none of the work in your case, then please take a fresh backup copy of your device and then restore like-new Phone. we know the process is a little long but hope this trick will give you a 100% positive result.

Anything help needs, please contact us! Please share your feedback in the comment box.

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Karly Wood

Karly Wood, a Wellington-based journalist, excels in covering Apple and tech trends. With a diverse background in public safety, government, and education reporting, her insights bridge multiple disciplines, offering readers a well-rounded perspective on today's technological advancements. Contact Her Team:- [OR]

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