How to fix Microsoft Outlook calendar events appearing as one hour off after Daylight Saving Time changes in Australia

Summary

This guide helps you troubleshoot and resolve: How to fix Microsoft Outlook calendar events appearing as one hour off after Daylight Saving Time changes in Australia. Follow the steps below to fix the issue.

Common Causes

After Daylight Saving Time (DST) transitions in Australia, Microsoft Outlook calendar events may appear one hour too early or too late. This typically occurs when Outlook, Windows, or your Microsoft 365 account are using different time zone rules. Users in Australian states that observe DST can resolve this by synchronising time zone settings across their devices and Outlook client.

Quick Fix Steps

1. Restart Microsoft Outlook to refresh calendar synchronisation.
2. Verify your Windows time zone is set to your correct Australian state (for example, (UTC+10:00) Brisbane for Queensland, or (UTC+10:00) Canberra, Melbourne, Sydney for New South Wales and Victoria).
3. Confirm Outlook Calendar is using the same time zone as Windows.
4. Update Windows to install the latest Australian DST rules.

Detailed Instructions

Check Windows Time Zone Settings

1. Select Start, then select Settings.
2. Go to Time & language > Date & time.
3. Ensure Set time zone automatically is turned On, or manually set the time zone to your Australian location.
4. Restart your computer.

Check Outlook Calendar Time Zone

1. Open Microsoft Outlook.
2. Select File > Options.
3. Select Calendar from the left menu.
4. Under Time zones, confirm the Current time zone matches your Windows setting.
5. If you travel between states, check Show a second time zone only if you need it, and ensure the primary zone is correct.
6. Select OK and restart Outlook.

Update Windows for Daylight Saving Time Rules

1. Select Start > Settings > Windows Update.
2. Select Check for updates.
3. Install any available updates and restart your computer when prompted.

Check Microsoft 365 Online Time Zone

1. Sign in to Outlook on the web at outlook.office.com.
2. Select the Settings (gear) icon > Calendar.
3. Verify the time zone under Calendar settings matches your Australian location.
4. Select Save.

Troubleshooting

Events Still Appear One Hour Off

• If the issue affects only recurring meetings created before the DST change, delete the old series and recreate it with the correct time zone.
• If you use a mobile device, check that the phone's time zone is set to automatically update.
• If you share calendars with colleagues in different Australian states, confirm each person's Outlook time zone matches their local Windows setting.
• Clear the Outlook cache and restart the application to force a refresh of calendar data from the server.

Meetings Created by External Organisations

• Meeting invites from external organisations may carry their own time zone data. Accept the meeting, then manually adjust the time in your calendar if Outlook converts it incorrectly.
• Ask the organiser to resend the invite using a time zone-aware booking tool if errors persist.

Note: Queensland does not observe Daylight Saving Time. If your business operates across state borders, ensure Outlook and Windows are set to your actual physical location, not a neighbouring state that observes DST.

Warning: Do not manually shift existing calendar events by one hour as a permanent fix. This can cause incorrect meeting times for attendees and synchronisation errors with Microsoft 365.

If calendar timing issues continue after following these steps, Open a Ticket with 220 Internet Services support.

Still Having Issues?