Additional borders appear in AgendaView when the Date column is sorted. This behavior is observed in the following themes:

• VisualStudio2012Light
• Office2019Light
• Office2019Gray
• Office2019Dark
• Office2013Dark (missing border)
• Office2013Light (missing border)
• TelerikMetro (missing border)
• TelerikMetroBlue (missing border)
• TelerikMetroTouch (missing border)
• Office2010Black (missing border)
• Office2010Silver (missing border)
• Office2010Blue (missing border)
• ControlDefault (missing border)
• Breeze (missing border)
• HighContrastBlack (missing border)
• Office2007 (missing border)

The local time is EEST — Eastern European Summer Time (Current Offset: UTC/GMT +3 hours). Add an additional time zone IST — India Standard Time (Current Offset: UTC/GMT +5:30 hours). It is expected to show 2 hours and 30 minutes difference between the two times zones. However, it is 1 hour and 30 minutes:

    Public Sub New()
        InitializeComponent()

        allTimeZones = SchedulerTimeZone.GetSchedulerTimeZones()
        Dim mumbai As SchedulerTimeZone = GetSpecificTimeZone("India Standard Time")
        If Not mumbai.Equals(Me.RadScheduler1.GetDayView().DefaultTimeZone) Then
            RadScheduler1.GetDayView().TimeZones.Insert(0, mumbai)
        End If

        Dim utc As SchedulerTimeZone = GetSpecificTimeZone("UTC")
        If Not utc.Equals(Me.RadScheduler1.GetDayView().DefaultTimeZone) Then
            RadScheduler1.GetDayView().TimeZones.Insert(0, utc)
        End If
    End Sub
    Private Function GetSpecificTimeZone(_TimeZoneInformationID As String) As SchedulerTimeZone
        Try
            Dim tempZone As New SchedulerTimeZone((From t In allTimeZones.Where(Function(x) x.TimeZoneInformation.Id Like _TimeZoneInformationID) Select t.TimeZoneInformation).First)
            tempZone.Label = tempZone.TimeZoneInformation.BaseUtcOffset.ToString()
            Return tempZone
        Catch ex As Exception
            Return Nothing
        End Try
    End Function

Actual: 1 hour behind the expected

Expected:

Workaround:

Public Class Form1

    Private allTimeZones As List(Of SchedulerTimeZone)

    Public Sub New()
        InitializeComponent()

        Me.RadScheduler1.ElementProvider = New CustomSchedulerElementProvider(Me.RadScheduler1)


        allTimeZones = SchedulerTimeZone.GetSchedulerTimeZones()
        Dim mumbai As SchedulerTimeZone = GetSpecificTimeZone("India Standard Time")
        If Not mumbai.Equals(Me.RadScheduler1.GetDayView().DefaultTimeZone) Then
            RadScheduler1.GetDayView().TimeZones.Insert(0, mumbai)
        End If

        Dim utc As SchedulerTimeZone = GetSpecificTimeZone("UTC")
        If Not utc.Equals(Me.RadScheduler1.GetDayView().DefaultTimeZone) Then
            RadScheduler1.GetDayView().TimeZones.Insert(0, utc)
        End If
    End Sub
    Private Function GetSpecificTimeZone(_TimeZoneInformationID As String) As SchedulerTimeZone
        Try
            Dim tempZone As New SchedulerTimeZone((From t In allTimeZones.Where(Function(x) x.TimeZoneInformation.Id Like _TimeZoneInformationID) Select t.TimeZoneInformation).First)
            tempZone.Label = tempZone.TimeZoneInformation.BaseUtcOffset.ToString()
            Return tempZone
        Catch ex As Exception
            Return Nothing
        End Try
    End Function
End Class

Public Class CustomSchedulerElementProvider
        Inherits SchedulerElementProvider

        Public Sub New(scheduler As RadScheduler)
            MyBase.New(scheduler)
        End Sub

        Public Overrides Function CreateRulerPrimitive(area As DayViewAppointmentsArea, timeZone As SchedulerTimeZone) As RulerPrimitive
            Dim ruler As RulerPrimitive = MyBase.CreateRulerPrimitive(area, timeZone)
            ruler.RulerRenderer = New CustomRulerRenderer(ruler)
            Return ruler
        End Function
    End Class

Public Class CustomRulerRenderer
    Inherits RulerRenderer


    Public Sub New(ruler As RulerPrimitive)
        MyBase.New(ruler)
    End Sub

    Public Overrides Sub RenderHour(g As IGraphics, hour As Integer, bounds As RectangleF)
        hour += Me.ruler.StartScale + CInt(Math.Ceiling(Me.ruler.DefaultOffset))
        Dim currentTime As DateTime = DateTime.Now.Date.AddHours(hour)
        Dim percent As Single = Me.ruler.DefaultOffset - CSng(Math.Floor(CDbl(Me.ruler.DefaultOffset)))
        Dim x As Integer = Me.ruler.HourLineStartPosition
        Dim y As Single = CSng(Math.Ceiling(bounds.Top + (GetSpecificRange() * bounds.Height) * percent))
        Dim hourText As String = ""

        If Me.ruler.FormatStrings.HoursFormatString IsNot Nothing Then
            hourText = currentTime.ToString(Me.ruler.FormatStrings.HoursFormatString)
        End If

        'Dim args As RulerTextFormattingEventArgs = New RulerTextFormattingEventArgs(hourText, RulerTextFormattingContext.Hour, currentTime)
        'Me.ruler.Scheduler.OnRulerTextFormatting(args)
        'hourText = args.Text
        Dim minutesText As String = ""

        If Me.ruler.FormatStrings.MinutesFormatString IsNot Nothing Then
            minutesText = currentTime.ToString(Me.ruler.FormatStrings.MinutesFormatString)
        End If

        'args = New RulerTextFormattingEventArgs(minutesText, RulerTextFormattingContext.Minute, currentTime)
        'Me.ruler.scheduler.OnRulerTextFormatting(args)
        'minutesText = args.Text
        Dim measuredSize As Size = TextRenderer.MeasureText(hourText, Me.ruler.Font)
        measuredSize = DrawTimeText(g, y, hourText, minutesText, measuredSize)

        If ruler.RightToLeft Then
            g.DrawLine(Me.ruler.HourLineColor, Me.ruler.Bounds.Left, y, Me.ruler.Bounds.Width - x, y, Me.ruler.DpiScaleFactor.Height)
            g.DrawLine(Me.ruler.HourLineShadowColor, Me.ruler.Bounds.Left, y + Me.ruler.DpiScaleFactor.Height, Me.ruler.Bounds.Width - x, y + Me.ruler.DpiScaleFactor.Height, Me.ruler.DpiScaleFactor.Height)
        Else
            g.DrawLine(Me.ruler.HourLineColor, x, y, Me.ruler.Bounds.Width, y, Me.ruler.DpiScaleFactor.Height)
            g.DrawLine(Me.ruler.HourLineShadowColor, x, y + Me.ruler.DpiScaleFactor.Height, Me.ruler.Bounds.Width, y + Me.ruler.DpiScaleFactor.Height, Me.ruler.DpiScaleFactor.Height)
        End If
    End Sub

    Friend Function GetSpecificRange() As Integer
        Return 60 / CInt(Me.ruler.RangeFactor)
    End Function
End Class

Add the possibility to enable rendering appointments not in the whole cell when their duration is less than the range factor of the view.

This request is to add Working hours range of the view, which will style the cells as working and non working. In addition, add a property ShowWorkingHours while will determine whether non-working hours are visible or not.

Or perhaps for the sake of consistency, we can have API as in the day view:
dayView.RangeFactor = ScaleRange.QuarterHour
dayView.RulerStartScale = 9
dayView.RulerStartScaleMinutes = 30
dayView.RulerEndScale = 14
dayView.RulerEndScaleMinutes = 45

To reproduce:
        Me.RadScheduler1.ActiveViewType = Telerik.WinControls.UI.SchedulerViewType.Timeline
        Dim timelineView As SchedulerTimelineView = Me.RadScheduler1.GetTimelineView()
        Dim currentScaling As SchedulerTimescale = timelineView.GetScaling()
        currentScaling.DisplayedCellsCount = 100

Try to scroll horizontally. Then, change the currentScaling.DisplayedCellsCount  property to 50 and try to scroll again. You will notice a considerable difference.

Workaround: reduce the number of the displayed visual cell elements by the DisplayedCellsCount.

Check out the Weekly calendar style in Outlook

Resolution: 
In Q2 2014 we introduced new feature: WeeklyCalendarPrintStyle. More information you can find in our help: http://www.telerik.com/help/winforms/scheduler-print-support-schedulerprintstyle.html, section WeeklyCalendarStyle

Check out the Outlook vertical scrolling abilities in MonthView

The occurrences and the navigation arrows are not displayed correctly when using YearlyRecurrence with the "First Monday of January" rule. The issue also appears with similar rule types.

When you subscribe to the AppointmentMoved or AppointmentDropped event of RadScheduler, the DataItem property of the appointment in the event args is always null.

1. Create a new project with RadScheduler.
2. Handle the AppointmentFormatting event and change appointment border color.
3. Run the project and add an appointment.

Steps to follow:
1. Select cells from 10:00pm (today) to 01:00am (next day).
2. Right click -> New Appointment
3. The Edit Appointment Dialog opens and the End Time is set to 23:59:59 instead of 01:00:00

To reproduce:
 public Form1()
 {
     InitializeComponent();

     for (int i = 0; i < 7; i++)
     {
         this.radScheduler1.Appointments.Add(new Appointment(DateTime.Now.AddHours(i),TimeSpan.FromHours(3),"App" + i));
     }
     this.radScheduler1.AutoSizeAppointments = true;
     this.radScheduler1.ActiveViewType = SchedulerViewType.Month;
     SchedulerMonthView monthView = this.radScheduler1.GetMonthView();
    
     monthView.EnableAppointmentsScrolling = true;
 }

Workaround: set the AutoSizeAppointments property to false.

To reproduce:

Color[] colors = new Color[]
{
    Color.LightBlue, Color.LightGreen, Color.LightYellow,
    Color.Red, Color.Orange, Color.Pink, Color.Purple, Color.Peru, Color.PowderBlue
};
Random rand = new Random();
for (int i = 0; i < 25; i++)
{
    Resource resource = new Resource();
    resource.Id = new EventId(i);
    resource.Name = i + ".Resource";
    resource.Color = colors[rand.Next(0, colors.Length)];
    this.radScheduler1.Resources.Add(resource);
}

this.radScheduler1.GroupType = GroupType.Resource;
this.radScheduler1.ActiveView.ResourcesPerView = this.radScheduler1.Resources.Count;

for (int i = 0; i < 3; i++)
{
    Appointment a = new Appointment(DateTime.Now.AddHours(i), TimeSpan.FromMinutes(30), "A" + i);
    a.ResourceId = this.radScheduler1.Resources.Last().Id;
    this.radScheduler1.Appointments.Add(a);
}

NOTE: it is also valid for the horizontal scrollbar in Timeline view.

Workaround: use the SetResourceSize to increase the last resource's width a little bit: http://docs.telerik.com/devtools/winforms/scheduler/views/grouping-by-resources

To reproduce:

public Form1()
{
    InitializeComponent();

    this.radScheduler1.ActiveViewType = SchedulerViewType.Day;
    RulerPrimitive ruler = (this.radScheduler1.SchedulerElement.ViewElement as SchedulerDayViewElement).DataAreaElement.Ruler;
    ruler.RangeFactor= ScaleRange.TenMinutes;
}

Workaround:

this.radScheduler1.GetDayView().RangeFactor = ScaleRange.TenMinutes;

To reproduce:  

1.Change the first day of week to Monday:

            SchedulerMonthView view = new SchedulerMonthView();
            CultureInfo ci = new CultureInfo("en-US");
 
            ci.DateTimeFormat.FirstDayOfWeek = DayOfWeek.Monday;
            view.CurrentCulture = ci;
            this.radScheduler1.ActiveView = view;
2. Create an appointment with a recurrence rule illustrated in the attached screenshot. Imagine that today is Wednesday and the recurrence rule starts on Monday from the same week.
As a result, you will notice that the WeeklyRecurrenceRule.FirstDayOfWeek is not set and the appointment occurs on the wrong Sundays. Refer to the attached screenshot. 

Workaround:

        private void radScheduler1_AppointmentAdded(object sender, AppointmentAddedEventArgs e)
        {
            if (e.Appointment.RecurrenceRule != null)
            {
                WeeklyRecurrenceRule r = e.Appointment.RecurrenceRule as WeeklyRecurrenceRule;
                r.FirstDayOfWeek = DayOfWeek.Monday;
            }
        }

Steps to reproduce:
            radScheduler.ActiveViewType = SchedulerViewType.Timeline;
            radScheduler.GetTimelineView().ShowTimescale(Timescales.Hours);
            radScheduler.GetTimelineView().GetTimescale(Timescales.Hours).DisplayedCellsCount = 10;//set 8 for workarround.

            radScheduler.ActiveView.StartDate = DateTime.Today;
            radScheduler.GetTimelineView().RangeStartDate = DateTime.Today.AddHours(7);
            radScheduler.GetTimelineView().RangeEndDate = DateTime.Today.AddDays(1);
            radScheduler.GetTimelineView().ResourcesPerView = 5;

            radScheduler.GroupType = GroupType.Resource;
            radScheduler.SchedulerElement.SetResourceHeaderAngleTransform(SchedulerViewType.Timeline, 0);

Let's say that you have an appoiment that starts at 8:30 and ends at 8:30. RadScheduler will display it as it should, but it will not be considered by the printing functionality.
We should also have in mind the case where there are several appointments starting from 8:30 and ending at 8:30.

BindingSource does not set the correct possition in the binding list and always fires the ListChanged event with an index of 0.

CLOSED: RadScheduler is not a list-editing control and does not support currency management.

Add functionality to navigate with a custom step. Currently, the navigation step can be only a day. In the future the user will be able to chose among "Day", "Week" and "Month".