thanks for the response. Unfortunately, it doesn't seem to help in my case.
showWorkDays property is set to false on our app by default.
If it helps, we use angularjs syntax in our app.
<div id="gantt" data-kendo-gantt="instance" data-k-options="ganttOptions"></div>
and extract from our ganttOptions:
If there is anything I can provide to help detecting issue, please let me know.
Thanks and regards,