I want to display only time series. but by default first label showing date. I want it to show "00:00"
You can set markPeriodChange
to false in your categoryAxis
to prevent the axis from bolding and using a different date format for the first date:
AmCharts.makeChart("chartdiv", {
// ...
categoryAxis: {
// ...
markPeriodChange: false,
// ...
}
});