[Solved]-How to remove blank spaces between xAxis labels?-Highcharts

Assign your groupPadding value very close to zero (or zero).

plotOptions: {
        series: {
            groupPadding: 0.01
        }
    },

Since you didn't post your code, I'll show another example

Cihad Turhan 2571

You can increase the column width by using pointWidth and shrink the spaces between years using groupPadding.

plotOptions: {
        series: {
            groupPadding: 0.01,
            pointWidth: 50
        }
    }

Source: stackoverflow.com