This is expected behavior, since it is server control. If you want entirely client side based calendar, please use KendoUI

We have a requirement were the users can select multiple range of dates from the Calendar control.The selected range of dates will be saved as "StartDate" and "EndDate" in the SQL database. In the Calendar control we have "RangeSelectionStartDate" and  "RangeSelectionEndDate " ,but this doesn't allow the user to select multiple range of dates .When the dates in the range are selected any other date selection deselects all dates from range selection.

It would be nice if we have the feature of selecting multiple range of dates in the upcoming release.


Regards
Karthik

We have just got issue with WCAG compatibility when applying for WCAG certification.
 The problem is that RadCalendar used for RadDatePicker has a strange behaviour when tabbing. We can't get focus to buttons (<<,<, >, >>)  that are in the header of the Calendar popup. We can successively navigate contemt of the Callendar -days of the month both with Tab and arrow keys (with EnableKeyboardNavigation="true"
 ) , but not to header buttons.
 We found nearly the same problem on Telerik demo: http://demos.telerik.com/aspnet-ajax/calendar/examples/functionality/keyboardnavigation/defaultcs.aspx

 Please look that Calendar at the top of the page does not allow select its header buttons. But the one in popup inside RadDatePicker can tab to its header buttons. 
 (however in strange way order is: days navigation inside Calendar1 by arrows, Tab- RadCalendar1, Tab- header of Callendar1 first button: <<)

Hi,

I would like RadDatePicker to have DropDown Combo boxes for years and months like attached picture please.

Kind Regards,
Asaf

RadDatePicker/RadDateTimePicker can not set different date than the current one in Win10 (IE11 and Edge) when Finnish and Norwegian culture is used.

Microsoft changed the Time separator for these cultures, it breaks not only our JavaScript parsing but the .NET parsing as well.
https://connect.microsoft.com/VisualStudio/Feedback/Details/1621722

The issue is fixed for Q3 2015 SP1. Internally we change the TimeSeparator used by the DateInput to ":" for cultures where it is the same as the DateSeparator. It will not affect the DateFormatString.

When handling the SelectionChanged event on a Calendar with EnableMultiSelect="true", there is no way to determine the new selected date(s). The SelectedDatesEventArgs exposes the entire range of selected dates, but it does not tell which of those dates were previously selected. Add a property to the event args that would expose this.

OR

Add an attribute to the RadCalendar when EnableMultiSelect="true" to "DeselectWhenSelectingNewDates." If this is set to true, any date selection on the calendar would deselect any previously selected dates.

Put more than two RadDatePicker with single SharedCalendar on page. some RadDatePicker are in side of UpdatePanel with a button in it. when I press that button RadDatePicker behaviour is strange. 
RadDatePicker inside UpdatePanel not opening Calendar popup while RadDatePicker outside UpdatePanel opens calendar popup but gives javascript error on any date selection. the javascript error is "Unable to get property '_selectedDates' of undefined or null reference".
It looks like it is destroying shared calendar object on partial postback.
Please find below sample code to replicate the issue. after clicking "Submit" button, it doesn't open calendar popup for "Date 2" and for "Date 1" it opens but doesn't allow to select date and gives JavaScript error.

----------------------
<asp:ScriptManager ID="sc1" runat="server" />
<telerik:RadCalendar ID="dtCal" runat="server" EnableMultiSelect="false" />
Date 1:
<telerik:RadDatePicker ID="dt1" Width="103px" runat="server" SharedCalendarID="dtCal" />
<hr />
<asp:UpdatePanel runat="server" ID="up">
	<ContentTemplate>
		Date 2:
		<telerik:RadDatePicker ID="dt2" Width="103px" runat="server" SharedCalendarID="dtCal" />
		<br />
		<asp:Button runat="server" ID="btnDT" Text="Submit" />
	</ContentTemplate>
</asp:UpdatePanel>
----------------------

When i add all controls in UpdatePanel it works properly. but Actual code is much more complex than above sample with too many lines of javascript code and many date pickers on single page and simply all Calendar and DatePicker controls can not be moved in UpdatePanel.

RadMonthYearPicker is missing form the SkinManager's ControlTypeToApplyskin collection

-> When DatePicker renders for the first time, it applies the CSS according to the selected skin.
Reference Image: Comtrol in Filter Panel first time render.jpg

-> But as soon as I enter into an edit mode or insert than the CSS is not applied to the control and the design of the RadCalender is breaking somehow.
Reference Image: Control while Editing.jpg

-> Also entering into edit or insert break the design of the other RadCalender control placed in filter panel.
Reference Image: Control in Filter Panel.jpg

As I'm using RadDatePicker in my Grid,

In RadGrid for the first time, the image beside the calendar control renders as expected.

As soon as I enter into "InLine" edit mode there would be 2 images rendered beside the control.

And after clicking on cancel there is no change in the image beside the control.

Also attached the screenshot for the same.

When MultiViewColumns > 2 the the month views of the Calendar are not aligned properly. The problem occurs if the week count in the months is different and the ShowOtherMonthsDays property is set to false.

There is no property indicating the next DateTime that user is going to,

for example, we are in November/2022 and the end user click on "<" back button,

the event return the current date.

RadCalendar1_OnHeaderCellRender

the  var nMes = cal.FocusedDate.Month; to return the current month.

It would be nice to be able to add to the standard date time formats that the RadDatePicker allows.  I don't want to override the standard formats, just add custom formats (ex: ddhhmm MMM yy)

From my point of view the RadDatePicker misinterprets date entries in ISO 8601 format.

The result of DateTime.Parse("2013-11-12") is "12. November 2013" for every culture setting (correct).

If i enter "2013-11-12" (yyyy-mm-dd) into the RadDatePicker textbox the result is "11. Dezember 2013" (wrong).

It should be possible to enter a date in the culture specific notation as well as according to ISO standard.

Regards,
Andreas

Telerik.Web.UI. Version: 2013.2.611.40
Try the code below with a simple aspx page:
<asp:ScriptManager runat="server"/>
<telerik:RadDateTimePicker runat="server" ID="DatePicker" />

the code is:
		protected void Page_Load(object sender, EventArgs e)
		{
			DatePicker.SkipMinMaxDateValidationOnServer = true;
			DatePicker.MinDate = DateTime.Parse("01.01.2014");
			DatePicker.SelectedDate = DateTime.Parse("01.01.2013");
			DatePicker.SelectedDate = DateTime.Parse("01.01.2015");
		}

Actual result: 
Browser shows 01.01.2013 date marked in red but not 01.01.2015 as it supposes to show