I am using VS2013 + ASP.NET MVC4 + Razor + Kendo Grid 2013.1.219
I am using sample from 
link 
(Custom popup to foreign key)
After lot of work and fixes, its finally working except datetime column is not working. Its passing null dates in create. I have tried setting up below:
[DataType(DataType.DateTime)]
or custom template.
columns.Bound(p => p.Begin_dm).Title("Begin Date").Width(250).Format("{0:MM-dd-yyyy H:mm:ss}").EditorTemplateName("DateTime");
columns.Bound(p => p.End_dm).Title("End Date").Width(250).Format("{0:MM-dd-yyyy H:mm:ss}").EditorTemplateName("DateTime");
Here is my modal:
public class ProviderMaintenanceSMS    
    {
        [ScaffoldColumn(false)]
        public int? PMID { get; set; }
        //[ScaffoldColumn(false)]
        [Required]
        [UIHint("GridForeignKey")]
        public int ProviderID { get; set; }
        [Required]
        //[DataType(DataType.DateTime)]
        public DateTime? Begin_dm { get; set; }
        [Required]
        //[DataType(DataType.DateTime)]
        public DateTime? End_dm { get; set; }
        //[ScaffoldColumn(false)]
        //public DateTime Create_dm { get; set; }
    }
View:
@using SystemDashboard;
@using Kendo.Mvc.UI;
@*model IEnumerable<SystemDashboard.ProviderMaintenanceSMS>*@
@(Html.Kendo().Grid<SystemDashboard.ProviderMaintenanceSMS>()
    .Name("grid1")
    .Columns(columns =>
    {
        columns.Bound(p => p.PMID).Hidden();
        columns.ForeignKey(p => p.ProviderID, (List<ProviderLookup>)ViewData["providers"], "ProviderID", "ProviderName").Title("Provider").Width(150);
        columns.Bound(p => p.Begin_dm).Title("Begin Date").Width(250).Format("{0:MM-dd-yyyy H:mm:ss}").EditorTemplateName("DateTime");
        columns.Bound(p => p.End_dm).Title("End Date").Width(250).Format("{0:MM-dd-yyyy H:mm:ss}").EditorTemplateName("DateTime");
        columns.Command(command => { command.Edit(); command.Destroy(); });
    })
    .ToolBar(toolbar => toolbar.Create())
    .Editable(editable => editable.Mode(Kendo.Mvc.UI.GridEditMode.PopUp))
    .DataSource(dataSource => dataSource
        .Ajax()
         .ServerOperation(false)
        .Events(events => events.Error("error_handler"))
            .Model(model =>
            {
                model.Id(p => p.PMID);
                model.Field(p => p.PMID).Editable(false);
                model.Field(p => p.ProviderID).DefaultValue(1); 
            })
        .Create(update => update.Action("EditingSMS_Create", "PM"))
                .Read(read => read.Action("EditingSMS_Read", "PM"))
                .Update(update => update.Action("EditingSMS_Update", "PM"))
                .Destroy(update => update.Action("EditingSMS_Destroy", "PM"))
    )
)
Controller Create Method: (dates are always null here)
   [AcceptVerbs(HttpVerbs.Post)]
        public ActionResult EditingSMS_Create([DataSourceRequest] DataSourceRequest request, ProviderMaintenanceSMS pm)
        {
            ProviderMaintenanceBusinessLayer BL = new ProviderMaintenanceBusinessLayer();
            BL.CreateOrUpdatePMSMS(pm);                        
            return Json(new[] { pm }.ToDataSourceResult(request, ModelState));
        }
Thank you in advance. Looking forward to your reply.
Manish