offsetGridLines (time scale) v2.6

HTML

<script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.18.1/moment.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/2.6.0/Chart.js"></script>
<canvas id="myChart1"></canvas>

JavaScript

var ctx1 = document.getElementById('myChart1').getContext('2d');
var chart1 = new Chart(ctx1, {
  type: 'bar',
  data: {
    datasets: [{
      data: [{x:'2016-12-25', y:20}, {x:'2016-12-26', y:10}]
    }]
  },
  options: {
    title: {
      display: true,
      text: 'offsetGridLines: true'
    },
    scales: {
      xAxes: [{
        type: 'time',
        time: {
          unit: 'day',
        },
        gridLines: {
          offsetGridLines: true
        }
      }]
    }
  }
});