.Editable(edit =>
{
    edit.TemplateName("SchedulerEditorTemplate");
})

/Home (folder)
    /EditorTemplates (folder)
        SchedulerEditorTemplate.cshtml
    Index.cshtml

using Kendo.Mvc.UI;
using System;
using System.Linq;

namespace MyApp.ViewModels.Calendars
{
    public class CalendarAppointmentViewModel : ISchedulerEvent
    {
        // Mandatory Custom Fields
        public int AppointmentId { get; set; }
        public int EmployeeId { get; set; }
        public string EmployeeName { get; set; }
        public bool Reminder { get; set; }
        public bool IsPending { get; set; }
        public bool IsActive { get; set; }
        public bool IsCompleted { get; set; }
        public bool IsCancelled { get; set; }

        // Kendo Fields
        public string Title { get; set; }
        public string Description { get; set; }
        public string Recurrence { get; set; }
        public string StartTimezone { get; set; }
        public string EndTimezone { get; set; }

        private DateTime start;
        public DateTime Start
        {
            get
            {
                return start;
            }
            set
            {
                start = value.ToUniversalTime();
            }
        }


        private DateTime end;
        public DateTime End
        {
            get
            {
                return end;
            }
            set
            {
                end = value.ToUniversalTime();
            }
        }

        public string RecurrenceRule { get; set; }
        public int? RecurrenceID { get; set; }
        public string RecurrenceException { get; set; }
        public bool IsAllDay { get; set; }

    }
}

public class CalendarAppointmentViewModel : ISchedulerEvent
{
    ...
}