Hi nitaGM,
You can have date picker for column editor.
Here is an example code which shows how to enable it:

{
    name: 'Updating',
    columnSettings: [
        {
            columnKey: "OrderDate",
            editorType: "datepicker"
        }
    ]
}

For more details you can look at the Editing Client Validation sample.

Best regards,
Martin Pavlov
Infragistics, Inc.

I have done as you told me, I've looked at the link Editing Client Validation sample.
Thanks to that I could fix a problem I had with css.
I was missing a reference.

Best regards.