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To change from a Parent with its own duration to having duration of children

Fri, 29 Apr 2016 22:56:09 GMT

It appears you simply delete the "Start of..." Parent event, true?

Mon, 02 May 2016 13:37:10 GMT

Yup. A parent event's duration is defined by the children within it. The "Start of" and "End of" events are child events, they just happen to be ones generated automatically. Every time you convert an event to a parent, it asks. If you know you're going to be adding more child events and don't need the default start/end events, you can always say no in the pop-up window.