DRusak

\Bitrix\Main\UI\Extension::load('amcharts4');
\Bitrix\Main\UI\Extension::load('amcharts4_theme_animated');

am4core.ready(function() {
            am4core.useTheme(am4themes_animated);
            var chart = am4core.create("chart1", am4charts.PieChart);
            chart.data = newData;
            ......
            ......
});

$arParam = [
    'arFields' => [
        'ID' => $id, // or 0 for add new event
        'OWNER_ID' => 5,// group 5
        'SECT_ID' => 13, // group 5
        'ATTENDEES_CODES' => ['U'.$userId],
        'CREATED_BY' => $userId,
        'IS_MEETING' => true,
        'SKIP_TIME' => false,
        'CAL_TYPE' => 'group', // 'user', 'company_calendar', 'events'
        'TZ_FROM' => 'America/Atikokan',
        'TZ_TO' => 'America/Atikokan',
        'DATE_FROM' => $from, // 01/19/2021 12:00
        'DATE_TO' => $to,     // 01/19/2021 14:00
        'NAME' => $name,
        'DESCRIPTION' => $text,
    ],
    'userId' => $userId,
    'checkPermission' => false,
];

$resId = CCalendar::SaveEventEx($arParam)['id'];