DateRangePicker default value not highlighting properly.

[neevany]

Bug report

• Package version(s): @blueprintjs/datetime 1.4.1
• Browser and OS versions: Version 57.0.2962.0 (Official Build) canary (64-bit), Mac Os Sierra 10.12 (16A323)

Steps to reproduce

import React from 'react';

import { DateRangePicker } from "@blueprintjs/datetime";

const TestDateRange = React.createClass({
  getInitialState() {
    return {
      selectedDateRange: [new Date("2016-12-04"),new Date()]
    }
  },
  componentWillMount() {
   
  },
  handleDateChange (value) {
    this.setState({ selectedDateRange: value})
  },
  render() {
    return (
      <div>
        <DateRangePicker
        allowSingleDayRange={true}
        value={this.state.selectedDateRange}
        onChange={this.handleDateChange}/>
      </div>
    );
  }
});

export default TestDateRange;

Actual behavior

Nov 4th is being highlighted.
Am i doing something wrong with initial state?

Expected behavior

Dec 4th should be highlighted