QML Calendar component takes times into account when interpreting minimalDate/maximalDate

There is a bug in Calendar type, if user specifies time in Date() function, then time is getting considered in deciding to enable and disable dates in Calendar. And somehow, 12:00:00 looks to be cut-off for this, Like if you execute the following code:

Calendar{    
  minimumDate: new _Date_(2018, 10, 1,11,59,00) // Enables 1st Nov, 2018   
  maximumDate: new _Date_(2018, 11, 1,11,59,00) // Disables 1st Dec, 2018
}

But when I change time to something past 12:00:00, its behavior changes like

Calendar {    
  minimumDate: new _Date_(2018, 10, 1,12,01,00)  // Disables 1st Nov, 2018
  maximumDate: new _Date_(2018, 11, 1,12,01,00) // Enables 1st Dec, 2018
}

I find this unexpected as time should not be considered in deciding the minimum or maximum date.