Hello Koolreport,
I use the new D3 package. I need to change the xFormat to work with date and time.
<?php
    SplineChart::create(array(
        "dataSource"=>array(
            array("date"=>"2018-09-01 22:10:00","temp"=>17.9),
            array("date"=>"2018-09-02 22:11:00","temp"=>18.1),
            array("date"=>"2018-09-04 22:12:00","temp"=>18.3),
            array("date"=>"2018-09-05 22:13:00","temp"=>17.8),
            array("date"=>"2018-09-09 22:14:00","temp"=>18.0),
        ),
        "columns"=>array(
            "date"=>array(
                "type"=>"date",
                "xFormat"=>"%Y-%m-%d %H:%i:%s",
                "xDisplayFormat"=>"%d.%m.%Y %H:%i:%s"
            ),
            "temp"=>array(
                "label"=>"R30P_S3",
                "type"=>"number",
                "decimals"=>1,
                "suffix"=>"°C" 
            ),
        )  
if I use "xFormat"=>"%Y-%m-%d %H:%i:%s" it doest work

Do you have a solution for that?.
Thank you in advance