You must enter a start time that begins after the current time. If the event started prior to creating/editing the event, you might consider adding a note in the body for when it truly started, while still setting the current time as the start time.
Hope this helps.
Thanks for the response. I think that is a defect as making a comment in an event is not a replacement for having an accurate calendar representation of an event. Thanks again for confirming John Decker