Hi Alain,
Thanks for contacting Syncfusion Support,
We have checked your query “How to calculate the working days ”.Currently we don’t have a support to return working days in DateTimePickerAdv.Please share us more details that how the DateTimePickerAdv control react for this requirement.It will be helpful for us to provide a prompt solution on this.
Please let us know if you have anyother concerns.We will be glad to assist you.
Regards,
Bharathi R