Hi Phill ,
I'm sending you an attachment how this event is created on my machine and how it is stored in the database. I still have problems reproducing your issue. Can you tell me what time zone settings and regional settings you are using. Also where is your SQL server located and what are its time settings.
According to your goal to create an event with equal start and end date - it's actually not possible to have some event starting and ending at the same time that's why the check is > not >= by design. Your other idea - to be able to create event with empty end date is acceptable for now, so we will log it as a new task which should be implemented
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