To Do: completedDateTime and timezone

Timo 46 Reputation points
2021-09-27T07:15:05.72+00:00

Goal: retrieve list of completed To Dos of a users for a given day.

The description of completedDateTime states that it refers to the timezone specified (link to doc). However it appears that the returned date value is always UTC midnight

Repo: I created and completed a test todo with the official Microsoft To Do app today on September 27th with my device set to "Denver - Standard Mountain Time" (local time 1 AM). When I list the todos via the API and specify the header "Prefer: outlook.timezone='America/Denver'", it returns: 

  "completedDateTime": {  
    "dateTime": "2021-09-26T18:00:00",  
    "timeZone": "Mountain Standard Time"  
  }

This is not correct. I completed the todo on September 27th - not September 26th.
What am I doing wrong?

This bug/question has been asked previously on GitHub but was closed: https://github.com/microsoftgraph/microsoft-graph-docs/issues/8192
It also was confirmed to be a bug there.

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  1. Timo 46 Reputation points
    2023-01-21T11:00:08.79+00:00

    Almost 3 years after I first reported this bug and it's still unfixed.

    Are there any plans to fix this in the future? @Shweta Choudhary

    1 person found this answer helpful.
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  2. Shweta Choudhary 601 Reputation points Microsoft Employee
    2021-09-28T10:09:20.177+00:00

    Thank you for reaching out.

    This is a known issue
    Unfortunately, I do not have any ETA as of now on this.

    Hope this helps.

  3. Constantin Kwiatkowski 45 Reputation points
    2023-02-16T04:57:33.53+00:00

    Same issue with start date time and due date time, is there any workaround?

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