How to Fix Calendar Not Working on iPhone

The calendar app on the iPhone serves as a crucial tool for organizing schedules, appointments, and events, helping users stay productive and on track. However, encountering issues with the calendar app, such as it not working properly, can be frustrating and disruptive to one’s daily routine.

In this comprehensive guide, we’ll delve into common reasons why the calendar may not be working on an iPhone and provide detailed solutions to resolve these issues effectively, ensuring a seamless scheduling experience.

Different Issues Users Face With Calendar App on iPhone

When the calendar app on an iPhone fails to function correctly, it can manifest in various ways, including events not syncing, app crashes, or incorrect date/time display. Several factors could contribute to these issues, ranging from software glitches to incorrect settings or outdated software. Identifying the root cause is essential for implementing the appropriate solutions.

Why is Calendar Not Working on iPhone?

Several factors may lead to calendar issues on an iPhone. Understanding these potential causes is crucial for troubleshooting effectively. Some common reasons include:

Software Glitches: Bugs or glitches within the iOS software may cause the calendar app to malfunction, leading to issues such as events not displaying correctly or app crashes.

Syncing Problems: Issues with iCloud or other calendar syncing services may prevent events from syncing across devices, resulting in inconsistencies between the iPhone and other platforms.

Incorrect Settings: Misconfigured settings within the calendar app or iOS settings may lead to issues such as incorrect date/time display, recurring events not functioning correctly, or calendars not appearing as expected.

Outdated Software: Running outdated versions of iOS or the calendar app may result in compatibility issues or software bugs that affect the app’s functionality.

Data Corruption: Corruption of calendar data stored on the iPhone may cause the app to behave unexpectedly or fail to display events properly.

Fix Calendar Not Working on iPhone

Resolving calendar issues on an iPhone requires a systematic approach to diagnose and address the underlying causes effectively. The following troubleshooting steps are designed to help users resolve calendar problems and restore normal functionality to the app:

1. Restart the iPhone

A simple restart can often resolve minor software glitches or temporary issues affecting the calendar app. Follow these steps to restart your iPhone:

  1. Press and hold the power button (or the side button, depending on your iPhone model) until the power off slider appears on the screen.
  2. Drag the slider to power off your iPhone.
  3. Once the device is powered off, press and hold the power button again until the Apple logo appears on the screen.
  4. Release the power button and allow the iPhone to restart.

After restarting, open the calendar app and check if the issue persists.

2. Check Date and Time Settings

Ensure that the date and time settings on your iPhone are configured correctly, as incorrect settings can lead to calendar issues. Follow these steps to check date and time settings:

  1. Open the Settings app on your iPhone.
  2. Scroll down and tap on “General.”
  3. Tap on “Date & Time.”
  4. Toggle on the “Set Automatically” option to allow your iPhone to automatically set the date and time based on your current location.
  5. If the “Set Automatically” option is already enabled, toggle it off and on again to refresh the settings.
  6. After verifying the date and time settings, open the calendar app and check if the issue is resolved.

3. Ensure Calendar Syncing is Enabled

Verify that calendar syncing is enabled for the appropriate accounts on your iPhone, such as iCloud, Google Calendar, or Exchange. Follow these steps to check calendar syncing settings:

  1. Open the Settings app on your iPhone.
  2. Scroll down and tap on “Passwords & Accounts.”
  3. Tap on the email account associated with your calendar (e.g., iCloud, Google).
  4. Ensure that the toggle next to “Calendars” is enabled to allow syncing of calendar events.
  5. Repeat this process for each email account containing calendar data.
  6. After enabling calendar syncing for all relevant accounts, open the calendar app and check if events are syncing correctly.

4. Update iOS and the Calendar App

Ensure that your iPhone is running the latest version of iOS and that the calendar app is up-to-date. Software updates often include bug fixes and improvements that address issues with app functionality. Follow these steps to update iOS and the calendar app:

  1. Open the Settings app on your iPhone.
  2. Scroll down and tap on “General.”
  3. Tap on “Software Update” to check for available updates.
  4. If an update is available, follow the on-screen instructions to download and install it.
  5. After updating iOS, open the App Store on your iPhone.
  6. Tap on your profile icon in the top right corner.
  7. Scroll down to the “Available Updates” section and look for the calendar app.
  8. If an update is available for the calendar app, tap on “Update” next to it to install the latest version.

5. Reset Calendar Settings

Resetting calendar settings on your iPhone can help resolve issues related to misconfigured settings or data corruption. Follow these steps to reset calendar settings:

  1. Open the Settings app on your iPhone.
  2. Scroll down and tap on “Privacy.”
  3. Tap on “Calendars.”
  4. Tap on “Reset Location & Privacy.”
  5. Enter your iPhone passcode if prompted.
  6. Tap on “Reset Settings” to confirm.
  7. After resetting calendar settings, open the calendar app and check if the issue persists.

6. Restore from Backup

If none of the above steps resolve the calendar issue, restoring your iPhone from a backup may help. Before proceeding with a restore, ensure that you have a recent backup of your iPhone data, as restoring from a backup will erase all data on your device. Follow these steps to restore your iPhone from a backup:

  1. Connect your iPhone to your computer and open iTunes (or Finder if you’re using macOS Catalina or later).
  2. Select your iPhone when it appears in iTunes or Finder.
  3. Choose the option to “Restore Backup.”
  4. Select the most relevant backup from the list and click “Restore.”
  5. Follow the on-screen instructions to complete the restore process.

7. Contact Apple Support

If the calendar issue persists after trying the above steps, it may indicate a more significant problem with your iPhone that requires further assistance from Apple Support. Contact Apple Support for personalized troubleshooting assistance or to schedule a repair appointment at an Apple Store or authorized service provider.


The calendar app on the iPhone is an essential tool for managing schedules and staying organized. When the calendar app encounters issues, such as events not syncing or incorrect date/time display, it can disrupt daily routines and cause frustration. By following the troubleshooting steps outlined in this guide, users can diagnose and address calendar issues effectively, ensuring a seamless scheduling experience on their iPhones.

Whether the problem stems from software glitches, syncing problems, or incorrect settings, implementing the appropriate solutions can help restore normal functionality to the calendar app. With patience and attention to detail, users can overcome calendar issues and continue to leverage their iPhones as valuable productivity tools in their daily lives.

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