Hi Eran,
Thanks for using Syncfusion products.
In Schedule control we can add appoinments without showing the start and End time values. Please refer the below code snippet which illustartes this:
ScheduleWebAppointment appointment = new ScheduleWebAppointment();
appointment.UniqueID = appointmentId++;
appointment.Owner = 1;
appointment.Subject = "testsubject";
appointment.StartTime = Convert.ToDateTime("01/16/2007 12:00:00");
appointment.EndTime = Convert.ToDateTime("01/16/2007 14:30:00");
appointment.AllowDrag = false;
appointment.TimeSpanColor = Color.FromName("DarkGray");
appointment.BackColor = Color.FromName("Azure");
this.Scheduler1.Appointments.Add(appointment);
Please refer our online browser samples from the below link, which illustartes your requirements:
http://www2.syncfusion.com/samplebrowser/samples.aspxPlease let me know if you have anyother concerns.
Regards,
Raji