Why Your iPhone Calendar Items Might Be Missing
When your calendar items are not showing on your iPhone, it can create significant disruption, leading to missed appointments and a disorganized schedule. This frustrating issue typically stems from several common underlying causes, ranging from simple sync settings to software glitches or account-related problems. Understanding these potential culprits is the first step toward a swift resolution. Before diving into troubleshooting, it is crucial to recognize that the phenomenon of calendar items not showing on iPhone can manifest in different ways: events might be entirely absent, only some events might be missing, or events might appear on one device but not another. Identifying the specific pattern of absence helps narrow down the possibilities.
The most frequent reasons for calendar items not appearing on an iPhone include synchronization issues between your iPhone and your iCloud or other calendar accounts (like Google Calendar or Exchange). If sync is paused, disabled, or encountering errors, new or updated events may not propagate to your device. Another significant factor is the display settings for calendars themselves; it is possible that certain calendars or event types are simply hidden from view. Furthermore, software bugs, outdated iOS versions, or even corrupted calendar data can lead to events vanishing unexpectedly. Occasionally, the problem might be tied to how your device is connected to the internet, as a stable connection is vital for real-time synchronization. Finally, account-specific issues, such as a compromised account or problems with the service provider, can also prevent calendar data from being accessed and displayed correctly on your iPhone.
- Syncing problems are the most common cause for missing calendar events.
- Incorrectly configured display settings can hide calendars or events.
- Software glitches or outdated iOS versions may cause data to disappear.
- Internet connectivity issues can prevent real-time calendar updates.
- Account-specific problems can interrupt calendar data access.
Understanding Calendar Syncing
At its core, your iPhone's calendar relies on synchronization services to keep your schedule consistent across all your devices and online accounts. When you add an event on your Mac, it should appear on your iPhone, and vice versa, provided both devices are connected to the same account (most commonly iCloud). When calendar items are not showing on iPhone, the synchronization process is often the primary suspect. This process involves your iPhone communicating with the server of your chosen calendar service (e.g., iCloud, Google, Outlook/Exchange) to send and receive updates. If this communication breaks down, your local calendar app may not reflect the most current state of your schedule. Common points of failure include a lack of Wi-Fi or cellular data, incorrect account credentials, or a temporary service interruption by your calendar provider. Ensuring your accounts are properly set up and have active connections is paramount for seamless calendar management.
The reliability of calendar synchronization is directly linked to the health of your account configurations on the iPhone. If an account is added but not set to sync calendars, or if sync is toggled off for that specific account, events will not appear. Similarly, if the account itself is experiencing authentication issues, the iPhone cannot establish a connection to retrieve calendar data. It is also important to note that different calendar services might have varying refresh rates or sync frequencies, though for major services like iCloud and Google Calendar, this is usually near real-time when an active connection is present. Problems can also arise if you are trying to sync multiple calendar accounts simultaneously; conflicts between services or device limitations could manifest as missing events.
The efficiency of calendar data transfer is also influenced by the volume of data. While the iPhone is designed to handle extensive calendars, extremely large datasets or frequent, rapid changes might, in rare cases, lead to temporary delays or sync errors. Therefore, addressing calendar items not showing on iPhone often begins with a thorough review of your account settings and network status.
Troubleshooting Steps for Missing Calendar Events
When you find your calendar items are not showing on your iPhone, a systematic troubleshooting approach is the most effective way to pinpoint and resolve the issue. This process involves checking settings, accounts, and device performance. Start with the simplest potential fixes and gradually move to more involved solutions. Each step is designed to either correct a misconfiguration or rule out a common cause of data loss or display problems.
Check Your Calendar Display Settings
The most straightforward reason for calendar items not showing on your iPhone is that the specific calendar or event type is simply hidden. Your iPhone's Calendar app allows you to toggle the visibility of different calendars associated with your accounts. If you use multiple calendars (e.g., Work, Personal, Family, shared calendars), one or more might have been accidentally deselected.
To check this:
- Open the Calendar app on your iPhone.
- Tap Calendars in the bottom-center of the screen.
- You will see a list of all calendars associated with your accounts (iCloud, Gmail, Exchange, etc.). Ensure that the checkboxes next to the calendars you expect to see events in are filled. If a calendar is unchecked, tap it to select it.
- Tap Done in the top-right corner to save your changes.
If events are still missing, ensure that all-day events or specific event types are not filtered out, though this is less common as a primary cause for items not showing on iPhone.
Verify Account Sync Settings
For your calendar events to appear on your iPhone, the associated account must be configured to sync calendars. If an account is added to your iPhone but calendar syncing is disabled for it, you will not see any events from that source. This is a critical step when calendar items are not showing on iPhone.
To verify sync settings:
- Go to Settings on your iPhone.
- Scroll down and tap on Calendar.
- Tap on Accounts.
- Select the account (e.g., iCloud, Gmail, Exchange) that is supposed to contain the missing calendar items.
- Ensure the toggle switch next to Calendars is turned ON (green). If it's off, tap it to enable syncing.
- If the toggle is already on, try turning it off and then back on again. This can sometimes force a re-sync.
- If you are using multiple accounts, repeat this process for each account that should be syncing calendar data.
After enabling or toggling sync, allow your iPhone a few minutes to re-sync the calendar data. A strong Wi-Fi or cellular connection is beneficial during this process.
Check Internet Connectivity
Calendar synchronization requires a stable internet connection, whether it's Wi-Fi or cellular data. If your iPhone is offline or has a weak connection, it cannot fetch or send updates, leading to calendar items not showing on iPhone.
To check your connection:
- Go to Settings > Wi-Fi and ensure you are connected to a network, or go to Settings > Cellular and ensure cellular data is enabled and functioning.
- Try opening a web page in Safari to confirm your internet connection is active.
- If your connection is unstable, try toggling Wi-Fi off and on, or toggling Airplane Mode on for 30 seconds and then off.
A robust connection is vital for the Calendar app to communicate with your account servers and display your events.
Restart Your iPhone
A simple restart can resolve many temporary software glitches that might be preventing your calendar items from showing on your iPhone. It allows the operating system and its applications to refresh.
To restart your iPhone:
- Press and hold either volume button and the side button until the power off slider appears.
- Drag the slider, then wait for your iPhone to turn off.
- Press and hold the side button again until you see the Apple logo.
After your iPhone restarts, open the Calendar app and check if your events have reappeared.
Update iOS
Outdated software can sometimes lead to compatibility issues or bugs that affect app functionality. Ensuring your iPhone is running the latest version of iOS can resolve many common problems, including those related to calendar items not showing on iPhone.
To update your iPhone:
- Connect your iPhone to a power source and a Wi-Fi network.
- Go to Settings > General > Software Update.
- If an update is available, tap Download and Install. Follow the on-screen prompts.
Always back up your device before performing a major software update.
Re-add Calendar Accounts
If none of the above steps work, the account configuration itself might be corrupted. Removing and re-adding the affected account can often fix persistent synchronization issues and resolve why calendar items are not showing on iPhone.
To re-add an account:
- Go to Settings > Calendar > Accounts.
- Tap the account you wish to remove.
- Tap Delete Account. Confirm the deletion. Note: This will remove all data associated with that account from your iPhone, but your data is usually safe on the service provider's server (like iCloud or Google).
- Restart your iPhone.
- Go back to Settings > Calendar > Accounts, tap Add Account, and select the service type (e.g., iCloud, Google).
- Sign in with your account credentials and ensure that Calendars is toggled ON during the setup process.
Allow time for the account to sync its data fully after re-adding.
Specific Scenarios and Advanced Checks
Beyond the general troubleshooting steps, certain specific scenarios can also lead to calendar items not showing on your iPhone. These might involve shared calendars, specific account types like Exchange, or issues arising from third-party calendar apps.
Shared Calendar Issues
If the missing events are from a shared calendar (e.g., a family calendar, a work team calendar), several factors could be at play. The person who owns or manages the shared calendar might have accidentally deleted the events, or perhaps they revoked your access to it. In other cases, the sharing invitation might not have been properly accepted, or the sync for that specific shared calendar has been interrupted.
What to check:
- Contact the owner or administrator of the shared calendar to confirm the events are still present on their end and that your access has not changed.
- If the shared calendar is not appearing at all, ensure it is selected in the Calendars view within the Calendar app.
- If you received an invitation to a shared calendar via email, check your inbox (and spam folder) for the invitation and ensure you accepted it.
When calendar items not showing on iPhone pertains to shared calendars, verification with the source is often the most direct route to a solution.
Exchange and Work Accounts
For users with work or school accounts using Microsoft Exchange, calendar synchronization can sometimes be more complex. Exchange accounts often have specific policies or server-side configurations that might affect how data is synced to mobile devices. It's also possible that your organization's IT department has specific guidelines on how calendar data should be displayed or accessed.
If you are experiencing issues with calendar items not showing on iPhone from an Exchange account:
- Verify the Exchange account settings within your iPhone's Settings > Calendar > Accounts. Ensure Mail, Contacts, and Calendars are all enabled for sync.
- Check the sync period. In Settings > Calendar > Accounts, tap your Exchange account, and under Mail Days to Sync, select All or a sufficiently long period. Sometimes, only a limited number of past events are synced by default.
- Contact your IT administrator. They can check server-side configurations, troubleshoot account permissions, or provide specific instructions for your organization.
It's possible that the issue is not with your iPhone but with how the Exchange server is configured to push data.
Third-Party Calendar Apps
While the native Apple Calendar app is robust, some users opt for third-party calendar applications (e.g., Fantastical, Google Calendar app). If your calendar items are not showing on iPhone within the native app but appear in a third-party app, the issue lies in how the native app is interacting with your accounts or if it's being used at all. Conversely, if events are missing from a third-party app but visible in Apple's Calendar, the problem is specific to that app's integration or settings.
If the native Calendar app is the problem:
- Ensure the native Calendar app is allowed to access your accounts. This is usually managed by the account sync settings already discussed.
- If you are using a third-party app as your primary calendar and events are not showing in Apple's app, ensure the account is correctly added and syncing calendars in iPhone's main settings.
- If the problem is within a specific third-party app, check that app's own settings, ensure it's updated, and consult its support documentation.
The interaction between native and third-party apps can sometimes lead to confusion regarding where events are stored and displayed.
Check for Software Conflicts
Occasionally, other apps or system processes might interfere with the Calendar app's operation. This is rare but can occur after installing new applications or making significant system configuration changes. If calendar items not showing on iPhone began immediately after installing a new app, consider that app as a potential conflict.
To investigate potential conflicts:
- Review recently installed apps and consider temporarily uninstalling them to see if calendar visibility returns.
- Ensure all apps, especially those that might interact with your calendar (like task managers, event planners, or scheduling tools), are updated to their latest versions.
- If the issue persists, consider resetting your iPhone's network settings (Settings > General > Transfer or Reset iPhone > Reset > Reset Network Settings). This will erase Wi-Fi passwords and cellular settings but can resolve deep-seated connectivity or sync issues.
These more advanced checks help cover less common but equally disruptive reasons for calendar items not showing on iPhone.
Reliable calendar access is fundamental to personal and professional organization; when events disappear, the immediate focus must be on re-establishing sync and display integrity.
When Calendar Items Remain Invisible
Despite exhausting the standard troubleshooting steps, there may be instances where calendar items are still not showing on your iPhone. This situation can be particularly concerning, but it often points to more persistent issues or requires intervention from service providers.
Contacting Apple Support
If you have followed all the recommended steps and your calendar events continue to be invisible, it might indicate a more complex software issue within iOS or a problem with your Apple ID and iCloud services. Apple's support team can offer advanced diagnostics and assistance.
When to contact Apple Support:
- If the issue affects all your calendars and accounts, and persists after re-adding accounts and resetting network settings.
- If you suspect a bug within the iOS operating system itself.
- If you are unable to resolve the problem through any of the self-help measures provided.
Apple Support can be reached through their website, the Apple Support app, or by visiting an Apple Store. Be prepared to describe the troubleshooting steps you have already taken.
Checking Service Status of Calendar Providers
Your calendar data is managed by online services like iCloud, Google Calendar, or Microsoft Exchange. If these services are experiencing outages or significant technical difficulties, it can prevent your iPhone from syncing and displaying calendar items.
How to check service status:
- For iCloud: Visit Apple's System Status page online. Look for an indicator next to 'iCloud Calendar'.
- For Google Calendar: Check the Google Workspace Status Dashboard.
- For Microsoft Exchange/Outlook: Search for Microsoft 365 Service health status.
If a service is reported as down or experiencing issues, you will need to wait for the provider to resolve the problem. Syncing should resume automatically once the service is restored.
Consider Data Recovery Options
In rare, extreme cases, especially if a sync error or deletion occurred without proper backup, data might be lost. If you have been using iCloud or another cloud-based service for your calendars, your data is typically stored on their servers. However, if there was a local corruption and no cloud backup, or if you deleted events and the sync propagated that deletion, recovery can be difficult.
Steps to consider:
- Check your iCloud.com or Google Calendar web interface: Log in via a web browser on a computer. Sometimes, events that don't appear on your iPhone might be visible online. You may be able to recover deleted events from a trash or recovery folder on these platforms.
- Review backups: If you regularly back up your iPhone to iCloud or a computer (using Finder or iTunes), check if a backup from before the events disappeared exists. Restoring from a backup can bring back lost data but will also revert other settings and data on your phone to that backup's state.
When calendar items not showing on iPhone is due to accidental deletion, timely recovery from a web interface or backup is crucial.
When to Seek Professional Help
If your calendar data is critical and none of the above steps yield results, consider seeking assistance from a professional IT technician or data recovery specialist. For business users with complex Exchange setups, an IT consultant specializing in Microsoft environments might be necessary.
This is particularly relevant if:
- Company data is involved and requires specialized handling.
- You are uncomfortable performing advanced resets or data recovery procedures.
- The issue appears to be hardware-related, though this is highly unlikely for calendar display problems.
While most issues with calendar items not showing on iPhone are resolvable with the steps outlined, knowing when to escalate ensures critical data is not permanently lost.
Preventing Future Calendar Sync Issues
To avoid the frustration of calendar items not showing on your iPhone in the future, adopting proactive habits and maintaining proper settings is key. These practices ensure your schedule remains consistent and accessible across all your devices.
Maintain Consistent Account Settings
The foundation of reliable calendar syncing is consistent configuration. Ensure that the correct accounts are added to your iPhone and that calendar syncing is enabled for all of them. Regularly review your Settings > Calendar > Accounts section to confirm that all expected calendars are listed and set to sync.
Key actions:
- Periodically check that the Calendars toggle is green for all relevant accounts.
- When adding new accounts, always verify that calendar sync is selected during setup.
- If you change your password for an online calendar service, remember to update it on your iPhone for that account in Settings.
This diligence prevents the common scenario where calendar items not showing on iPhone are simply due to a forgotten password or a misconfigured account.
Keep iOS and Apps Updated
Software updates often include bug fixes and performance improvements that can prevent or resolve synchronization issues. It is crucial to keep your iPhone's operating system and all your applications, especially the Calendar app and any third-party calendar apps, up-to-date.
How to stay updated:
- Enable automatic iOS updates in Settings > General > Software Update > Automatic Updates.
- Regularly check the App Store for updates to all your installed applications.
This practice is vital, as many calendar items not showing on iPhone issues are resolved by the latest software patches.
Ensure Stable Internet Connection
A consistent and stable internet connection is non-negotiable for real-time calendar synchronization. Without it, your iPhone cannot communicate with your calendar servers.
Tips for stability:
- Prefer Wi-Fi connections when available, as they are generally more stable than cellular data.
- If using cellular data, ensure you have a strong signal.
- Avoid using your phone when the connection is exceptionally weak or intermittent.
Prioritizing a good connection minimizes disruptions when calendar items not showing on iPhone is a potential concern.
Utilize Cloud Services Wisely
Leveraging cloud services like iCloud Calendar or Google Calendar provides a safety net. These services not only sync your data but also act as a backup.
Best practices:
- Ensure you are logged into your primary cloud account (e.g., iCloud) on all your Apple devices.
- Periodically log in to your calendar service via its web interface (e.g., iCloud.com, calendar.google.com) to ensure your data is being stored correctly.
- Understand your service's backup and recovery options.
This robust cloud integration is your best defense against data loss and helps ensure calendar items are always accessible.
Regular Backups
While cloud sync handles day-to-day consistency, full device backups are crucial for recovering from more severe issues, including potential data loss. Backing up your iPhone to iCloud or your computer ensures that if a catastrophic event occurs, you can restore your device to a previous state, potentially including your calendar data.
How to back up:
- iCloud Backup: Go to Settings > [Your Name] > iCloud > iCloud Backup and tap Back Up Now. Ensure it's set to back up automatically.
- Computer Backup: Connect your iPhone to a Mac (using Finder) or a PC (using iTunes) and create a backup.
Consistent backups are a failsafe, ensuring that even if calendar items not showing on iPhone becomes a persistent problem, you have a way to restore your information.
When setting up a new calendar account, always allow it ample time to sync its initial data before assuming events are missing; large historical calendars can take a while to download completely.
Understanding iOS Calendar Features
The Calendar app on your iPhone is more than just a simple list of dates; it's a powerful tool integrated deeply with iOS and your Apple ecosystem. Understanding its core features and how they interact with your accounts can shed light on why calendar items might not be showing on your iPhone and how to manage them effectively.
iCloud Calendar Integration
iCloud is Apple's cloud service that synchronizes data across all your Apple devices. For most iPhone users, iCloud Calendar is the primary method for keeping their schedule updated. When you enable Calendars in iCloud settings (Settings > [Your Name] > iCloud > Show All > Calendar), your iPhone syncs with the iCloud server. Any changes made on your iPhone, Mac, or iPad will reflect across all devices. If calendar items are not showing on iPhone, and you use iCloud, it's highly probable that either the iCloud sync isn't active for calendars, or there's a temporary glitch with the iCloud service itself.
Key aspects of iCloud Calendar:
- Automatic Sync: When connected to the internet, iCloud Calendar syncs automatically in the background.
- Cross-Device Consistency: Events added on one device appear on all others signed into the same Apple ID.
- Sharing Capabilities: iCloud allows you to share calendars with other Apple users.
Troubleshooting iCloud-related issues often involves verifying your Apple ID login, checking iCloud status, and ensuring calendar sync is enabled within iCloud settings.
Adding and Managing Other Accounts
Beyond iCloud, your iPhone supports adding calendars from other popular services like Google, Outlook/Exchange, and Yahoo. These accounts can be added through the Settings > Calendar > Accounts menu. Once added, these calendars will appear alongside your iCloud calendars in the Calendar app, provided you've enabled calendar syncing for them.
When calendar items not showing on iPhone is related to these accounts:
- Google Calendar: Ensure you sign in with your Google account and allow access to Calendar. Google Calendar events should then appear.
- Exchange/Outlook: These are common for work or school. Proper setup often requires server details, but most modern setups use automatic discovery.
- Other IMAP/CalDAV: Some services may support the CalDAV protocol, allowing integration.
Each account added has its own sync settings, and a failure in one account does not necessarily affect others, but it's essential to check each one individually if events are missing.
The 'Calendars' View and Filter Options
The primary interface for managing which calendars are visible is the Calendars screen within the Calendar app. Tapping Calendars at the bottom of the main view presents a list of all available calendars, categorized by account. Each calendar has a checkbox next to it; if unchecked, events from that calendar will not be displayed.
This screen is paramount when troubleshooting calendar items not showing on iPhone:
- Visibility Toggle: Ensure all desired calendars are checked.
- Account Grouping: Calendars are grouped by the account they belong to (iCloud, Gmail, etc.). This helps identify if the issue is account-specific.
- Shared Calendars: Shared calendars will also appear here, often with the name of the person who shared them.
It's a common oversight for users to accidentally deselect a calendar, leading them to believe events have disappeared.
Default Calendar Setting
When you create a new event, it is assigned to a default calendar. This setting is important because if you create an event and it defaults to a calendar that is currently hidden or not syncing, you won't see it. You can set your default calendar in Settings > Calendar > Default Calendar.
Why this matters:
- New Event Assignment: Sets which calendar new events are automatically added to.
- Consistency: Ensures new entries go to a predictable location.
If you're not seeing new events you've just added, check that your default calendar is one that is actively syncing and visible.
Notifications and Event Reminders
While not directly related to calendar items not showing on iPhone, it's worth noting that notification settings can impact your awareness of events. If events are present but you're not being reminded, check Settings > Notifications > Calendar to ensure alerts are configured correctly. This is a separate issue but often confused with missing events.
This section provides foundational knowledge on how the Calendar app functions within iOS, offering context for the troubleshooting steps that follow.
Common Pitfalls and User Errors
Even with robust troubleshooting, users can sometimes overlook simple mistakes or fall into common traps that lead to the perplexing problem of calendar items not showing on iPhone. Recognizing these pitfalls can save time and prevent unnecessary frustration.
Confusing Different Accounts
A frequent cause of confusion is having multiple calendar accounts (e.g., personal iCloud, work Outlook, Google Calendar for a hobby group) and not distinguishing which events belong to which. When events from one account are expected but not seen, the user might be looking at the wrong calendar or have that account's sync disabled.
How this happens:
- Accidental Account Removal: A user might remove an account from their iPhone, forgetting that it held important calendar data.
- Default Calendar Confusion: If the default calendar is set to an account that is not syncing, new events will go unseen.
- Misplaced Events: Events created hastily without checking which calendar is active can end up in an unexpected place.
Always verify the account associated with an event, especially if you manage multiple calendars.
Ignoring Software Update Prompts
Apple regularly releases iOS updates that include critical bug fixes. Ignoring these prompts can leave your device vulnerable to known issues, including those that might affect the Calendar app's performance. If calendar items not showing on iPhone started after a specific period without updates, this is a strong indicator of the cause.
The danger of not updating:
- Unpatched Bugs: Known issues that cause data display or sync problems remain unresolved.
- Compatibility Issues: Newer versions of calendar services might not fully interact with older iOS versions.
- Security Risks: Updates also patch security vulnerabilities, which, while not directly related to calendar visibility, are crucial for overall device health.
Treating software updates as optional is a significant risk for app functionality.
Over-Reliance on a Single Sync Method
While iCloud is the primary sync for Apple devices, relying solely on it without understanding its limitations or without a secondary backup can be problematic. If iCloud experiences an outage or account issue, your calendar could become inaccessible.
Why diversification helps:
- Redundancy: Using Google Calendar or Exchange alongside iCloud can provide a backup if one service fails.
- Cross-Platform Access: If you use non-Apple devices, other services offer better integration.
This approach ensures that if calendar items not showing on iPhone due to an iCloud-specific problem, you have alternative access.
Not Verifying Web-Based Calendars
Many users troubleshoot only on their iPhone. However, the web interface for services like iCloud.com or Google Calendar often provides a clearer picture of the actual data stored on the server. If events are missing on the iPhone but present online, the issue is almost certainly with the device's sync or display settings.
The benefit of web verification:
- Source of Truth: The web version represents the server's state, uninfluenced by device-specific glitches.
- Recovery Options: Web interfaces often have more robust data recovery and management tools.
Always check the web version of your calendar service if calendar items not showing on iPhone is a persistent problem.
Ignoring Permissions and Restrictions
In some corporate or educational environments, mobile device management (MDM) profiles can impose restrictions on apps, including calendar access. While less common for personal devices, it's a possibility for work-issued iPhones.
Consider these restrictions:
- MDM Profiles: IT administrators can limit which accounts can be added or how data is synced.
- Screen Time: While Screen Time primarily limits app usage, overly strict settings could theoretically interfere, though it's rare for the Calendar app itself.
These potential pitfalls highlight why a methodical approach, considering all aspects of account management and device settings, is crucial when calendar items not showing on iPhone.
Frequently Asked Questions About iPhone Calendars
Here are answers to common questions users have when experiencing issues with their iPhone calendars, particularly when events aren't displaying as expected.
Why are my calendar events disappearing?
Calendar events typically disappear due to synchronization errors, account issues where sync is disabled, or accidental deletion. It could also be that the calendar is hidden in the app's display settings or that a software glitch is occurring.
Can I recover deleted calendar events on my iPhone?
Yes, often. If events were deleted from an iCloud or Google Calendar, you can usually recover them from the 'Recently Deleted' folder or trash within the web version of these services (iCloud.com or calendar.google.com). Restoring from an iPhone backup is also an option if the deletion happened recently.
How do I force my iPhone calendar to sync?
To force a sync, open the Calendar app, tap 'Calendars' at the bottom, then pull down from the top of the screen to refresh. You can also try toggling the Calendar sync for an account off and on in Settings or restarting your iPhone.
What if my shared calendar is not showing events?
First, ensure the shared calendar is selected in the 'Calendars' view. If it remains empty, contact the calendar owner to verify that the events are still present on their end and that your access permissions haven't changed.
Why does my iPhone calendar not show events from my Google account?
Ensure your Google account is added to your iPhone in Settings > Calendar > Accounts, and that the 'Calendars' sync toggle is enabled for that account. Also, check that the Google Calendar itself is selected in the Calendar app's 'Calendars' view.
My calendar events appear on my Mac but not my iPhone, why?
This usually indicates a sync issue between your iPhone and iCloud or another linked account. Check your iPhone's Wi-Fi/cellular connection, ensure calendar sync is enabled for the relevant account in Settings, and try restarting your iPhone.
How can I reset my iPhone calendar settings?
There is no single 'reset calendar settings' option. You can try removing and re-adding the specific calendar account(s) involved (Settings > Calendar > Accounts), or as a more drastic step, reset network settings (Settings > General > Transfer or Reset iPhone > Reset Network Settings).