"datetime"
or
"category"
$('#container').highcharts({ xAxis: { type: 'datetime', labels: { formatter: function () { return Highcharts.dateFormat('%m-%d ', this.value); } }, startOnTick: true, endOnTick: true, }, series: [{ pointStart: Date.UTC(2014, 1, 1), //JS時間戳 1388534400000 data: [29.9, 19.9, 42.9, 20.9] }] });