I am afraid that all days for same view should have same start and end time. It is possible to set dynamically the start and end time for the current view. For example if 17th, 18th and 19th of February are shown in the same view they should have same start and end time.
But if 18th of February is shown when you click on the next period you can set different start and end time for that view, but I guess that this is not your case.
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