title: Highcharts ignore skipped dates
body: <p>I'm working on a heat map with a lot of dates, but I've now removed weekends from the data. Unfortunately, that had the side effect of adding blanks to the heat map.</p>
  
  <p>I've tried the connecting nulls option to no avail: <a href="https://api.highcharts.com/highcharts/plotOptions.series.connectNulls" rel="nofollow noreferrer">https://api.highcharts.com/highcharts/plotOptions.series.connectNulls</a></p>
  
  <p>Also tried: showEmpty:false</p>
  
  <p>And I'm aware of <a href="https://www.highcharts.com/demo/spline-irregular-time" rel="nofollow noreferrer">https://www.highcharts.com/demo/spline-irregular-time</a>, but don't know if I can apply that here.</p>
  
  <p>Here is a pic:
  <a href="https://i.stack.imgur.com/p1XoF.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/p1XoF.png" alt="heatmap"></a>
  Ideally I would figure this out because I intend on thinning out the data further. For example I may remove every other day.</p>
  
  <p>Here is the pertinent chart code:</p>
  
  <pre><code>{
  
   ...
  
   xAxis: {
    type: 'datetime',
    labels: {
    align: 'left',
    x: 5,
    y: 14,
    format: '{value:%B}'
   },
   tickInterval: 30 * 24 * 3600 * 1000,
  },
  series: [{
    boostThreshold: 100,
    borderWidth: 0,
    nullColor: '#EFEFEF',
    colsize: 24 * 36e5, // one day
    tooltip: {
     headerFormat: '&lt;b&gt;Details&lt;/b&gt;&lt;br/&gt;',
     pointFormat: 'Date: {point.x:%A, %b %e, %Y}&lt;br/&gt;Underlying Price: ${point.y}&lt;br/&gt;Positon Value:{point.positionvalue}&lt;br/&gt;NET:{point.net}&lt;br/&gt;ROI:{point.roi}%'
     },
     turboThreshold: Number.MAX_VALUE // #3404, remove after 4.0.5 release
    }]
  
  ...
  
    app.chart.config["series"][0]["data"] = chartData;
  
  </code></pre>
  
  <p>The chartData variable looks something like:</p>
  
  <pre><code>[{
   net: -0.2
   positionvalue: -0.54
   roi: -30.3
   value: -30.3
   x: 1591329600000
   y: 55
  }]
  
  </code></pre>
  
  <p>If you need to see it in prod I can attach my url.</p>
  
  <p>UPDATE:
  Here is a fiddle:
  <a href="https://jsfiddle.net/vo8syrhn/" rel="nofollow noreferrer">https://jsfiddle.net/vo8syrhn/</a></p>