meeting scheduler shows winter time

Question

I just noticed, when I am using the scheduler for finding a meeting slot for me and my colleagues it shows the timeline in winter time, in the regular calendar view it is correct.

Microsoft Outlook Version: 1.2026.317.100

Client Version: 20260313003.09

WebView2 Version: 146.0.3856.72 (Stable)

Session ID: [Moderator note: personal info removed] 

Answer 1

Hi @Gudrun Hochwallner,

Thank you for your post and for sharing the detailed observations.

What you’re seeing is most likely a known Daylight Saving Time (DST) display behavior in the new Outlook calendar and Scheduling Assistant, particularly when multiple time zones are shown and the visible range includes the DST change day.

Microsoft has documented that when the calendar view includes the first or last day of DST, the time bar may display an incorrect offset, which can cause meetings or availability to appear shifted in that view. In their examples, a Week view that starts on the Sunday when DST changes can show incorrect hour differences and misaligned events. Once that DST‑change day is no longer part of the visible range (for example, when viewing the following week), the timeline usually displays correctly again. This matches the behavior you described: the main calendar looks correct, while the scheduling timeline around the DST transition does not.

Microsoft has also noted that, in the new Outlook, the affected DST hour may be duplicated or omitted on the time strip, and they explicitly mention that unexpected behavior can appear when scheduling meetings that cross the DST boundary. Improvements in this area are ongoing.

For more details and suggested workarounds, you can refer to the following articles:

• Daylight Saving Time in New Outlook Calendar - Microsoft Support
• Multe zones show an incorrect time difference when DST starts and ends - Outlook | Microsoft Learn

If you have any additional questions or would like to discuss this further, please feel free to leave a comment under this post so I can be notified and follow up with you.

Thank you for your time, and I hope this provides a helpful reference for your concern.

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Answer 2

The behavior is caused by how Outlook handles time zones, meeting hours, and Daylight Saving Time (DST) in calendar views and the Scheduling Assistant.

In new Outlook for Windows, DST transitions can cause the time bar and events to appear offset or duplicated/omitted around the changeover hour. When the calendar view starts on, or includes, the DST switch day, Outlook may show multiple time bars and an apparent one‑hour shift for some slots. This can make it look like the Scheduling Assistant is using “winter time” even though the main calendar view looks correct.

To reduce the confusion and ensure the correct time zone is used for scheduling:

1. Verify the calendar time zone and meeting hours time zone match:
   • In Outlook on the web, go to Calendar > Settings > Calendar > View.
   • Check the Time zones setting and confirm it matches the time zone used for meeting hours. If they differ, update them so they are the same.
2. Be aware of the DST visualization in new Outlook:
   • Around the DST switch, the calendar may show duplicated or omitted hours and extra time bars for the affected day(s).
   • Events that cross the DST hour will have their actual duration correctly reflected in the event details, even if the visual time bar looks unusual.
3. Workaround for clearer scheduling around DST:
   • Switch the calendar to Work week view when scheduling. For many time zones, this removes the extra DST time bars while still applying the correct DST adjustment.

If the profile card or colleague availability appears to show the wrong time zone, confirm that their meeting-hours time zone is also aligned with their calendar time zone using the same Time zones setting in Outlook on the web.

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References:

• Daylight Saving Time in New Outlook Calendar
• Show your hybrid-work location, availability to meet, work hours, and more