Highcharts date misunderstood - highcharts

Question

I use highcharts from a long time until this January, that date is misunderstood with September.
I read a CSV file like this:
09.01.21 00:40:01;331.000;100.000
09.01.21 00:45:01;331.000;100.000
09.01.21 00:50:01;331.000;100.000
09.01.21 00:55:01;331.000;100.000
That is dd.mm.YY HH:MM:SS, 9 of January 2021, But on Highcharts I see 1 of Setember.
I tried to format date with dateFormat: 'dd/mm/YY' but don't work https://api.highcharts.com/highcharts/data.dateFormat
Here the code:
Highcharts.chart('container', {
title: { text: 'Log' },
data: { csv: document.getElementById('csv').innerHTML, itemDelimiter: ';',
lineDelimiter: '\n', decimalPoint: '.' ,dateFormat: 'dd/mm/YY'},
plotOptions: { series: { visible: false, marker: { enabled: false } } },
series: [{},{visible: true}] });
How I can solve?

Answer 1

Your dates are not valid with the 'dd/mm/YY' format, please check this example with valid dates: https://jsfiddle.net/BlackLabel/jgyu6q9h/
You can use the parseDate function to convert your dates to timestamps:
data: {
...,
parseDate: function(date) {
var parts = date.split(' '),
dateParts = parts[0].split('.'),
convertedDate = '20' + dateParts[2] + '-' + dateParts[1] + '-' + dateParts[0] + 'T' + parts[1];
return new Date(convertedDate).getTime();
}
}
Live demo: https://jsfiddle.net/BlackLabel/edx3cvno/
API Reference:
https://api.highcharts.com/highcharts/data.parseDate
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Date/Date