To reproduce: public Form1() { InitializeComponent(); Appointment a1 = new Appointment(new DateTime(2015, 03, 04, 10, 30, 0), TimeSpan.FromMinutes(30), "A1"); Appointment a2 = new Appointment(new DateTime(2015, 03, 04, 11, 00, 0), TimeSpan.FromMinutes(30), "A2"); Appointment a3 = new Appointment(new DateTime(2015, 03, 04, 11, 30, 0), TimeSpan.FromMinutes(30), "A3"); this.radScheduler1.Appointments.Add(a1); this.radScheduler1.Appointments.Add(a2); this.radScheduler1.Appointments.Add(a3); DateTime currentDate = new DateTime(2015, 03, 03, 09, 00, 10); this.radScheduler1.FocusedDate = currentDate; SchedulerTimelineView timelineView = radScheduler1.GetTimelineView(); timelineView.ShowTimescale(Timescales.Minutes); timelineView.RangeStartDate = currentDate.AddMonths(-3); timelineView.RangeEndDate = currentDate.AddMonths(3); timelineView.GetScaling().DisplayedCellsCount = 10; } Workaround: Use the date part only: DateTime currentDate = new DateTime(2015, 03, 03, 09, 00, 10); currentDate = currentDate.Date;