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How to Fix Windows Calendar Not Syncing with Outlook or Google on Windows

Calendar app not showing events, sync failing with Outlook or Google Calendar, or notifications not appearing for upcoming events? Fix Windows Calendar sync and account connection issues.

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Main Troubleshooting Guide

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Complete symptoms, causes, and step-by-step solutions

Symptoms

You might be experiencing this problem if you notice:

  • •Calendar app shows no events despite having appointments
  • •Google Calendar events not appearing in Windows Calendar
  • •Outlook.com calendar sync stuck or delayed
  • •Calendar notifications not popping up for upcoming events
  • •"Your account settings are out of date" error in Calendar
  • •New events created on phone not showing on PC (or vice versa)

Common Causes

  • âš Calendar account disconnected or authentication expired
  • âš Sync interval too long (Windows Calendar syncs periodically, not real-time)
  • âš Calendar app permissions revoked for the account
  • âš Google account app-specific password required (if 2FA enabled)
  • âš Windows privacy settings blocking Calendar app access
  • âš Corrupted Calendar app cache

Solutions

Solution 1: Re-sync Calendar Account

  1. 1Open the Calendar app
  2. 2Click the gear icon (Settings) > Manage Accounts
  3. 3Click the account that's not syncing
  4. 4Click "Delete account from this device"
  5. 5Re-add the account: Settings > Manage Accounts > Add account
  6. 6Choose your account type (Outlook.com, Google, Exchange, etc.) and sign in

Solution 2: Fix Google Calendar Sync

  1. 1Google Calendar requires specific setup in Windows:
  2. 2Add as "Google" account type (not "Other" or IMAP)
  3. 3Sign in with your Google credentials and grant permissions
  4. 4If you have 2FA: you may need to allow the Windows app in Google security settings
  5. 5After adding: go to Calendar settings > click the Google account > set sync frequency to "As items arrive"
  6. 6Events should appear within a few minutes

Solution 3: Repair Calendar App

  1. 1Go to Settings > Apps > Installed apps > Mail and Calendar
  2. 2Click Advanced options > Repair
  3. 3If Repair doesn't work: click Reset (you'll need to re-add accounts)
  4. 4Also check: Settings > Privacy & security > Calendar > ensure Calendar app has access
  5. 5For notifications: Settings > System > Notifications > ensure Calendar is allowed
  6. 6If still broken: uninstall and reinstall from Microsoft Store
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