GraphApi showing different data than Outlook calendar

Question

Question Title: I have an Away (or 'oof') events in my calendar from 30th Dec 2022 till 6th Jan 2023.
But thru GrapiApi this event endtime is showing at 7th Jan 2023.

I have tried passing (or not passing) headers as well prefer:outlook.timezone="W. Europe Standard Time"

Please see the attached image :

Don't know why EndDate is shifting 1 day.
thanks in advance.

Answer 1

Hello @Rupesh Kumar ,

Thanks for reaching out!

When creating an "All Day" event using Outlook UI, the start and end times only specify the date, not the date and time. As per my understanding on this, it is working as per it is designed. Graph API is simply following the Outlook UI and returning results in response. An Allday event runs from midnight this day to midnight next day. Midnight of "2023-01-07T00:00:00" is basically the end of "2023-01-06" or more precisely ("2023-01-06T23:59:59").

Hope this helps.

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