1. Open Timeline view in jQuery Scheduler Widget Demo | Kendo UI for jQuery (https://demos.telerik.com/kendo-ui/scheduler/timeline) 

2. Edit in Kendo UI Dojo

3. Edit an event using the scheduler's event editor so that it is multi day, begins a week prior and ends at the start of the second day of a week at the time of a work day (Event: 06/02/2025 8AM - 06/10/2025 8 AM) (see attached screenshot)

4. Switch to "Work hours" instead of "Full day" view

=> The event is incorrectly displayed, missing a whole day.

Device : Windows 10 tablet

Browser : Latest Chrome and Edge

When trying to move an event vertically inside the scheduler, the entire web page is scrolling. This cause the event to not move has supposed to.

The problem can be exprienced on the demo page of the scheduler : https://demos.telerik.com/kendo-ui/scheduler/move-resize

Thank you

Bug report

Setting a required validation message for a date field through the model has no effect.

Reproduction of the problem

1. Open this Dojo example - https://dojo.telerik.com/iviweSOr/6
2. Edit an event
3. Clear the start/end field and try to save.

Current behavior

The custom validation message is not applied.

Expected/desired behavior

You should be able to change the message through the model

Environment

• Kendo UI version: 2022.2.510
• Browser: [all]

Bug report

Reproduction of the problem

1. Open and run the Dojo - https://dojo.telerik.com/OXSpsxQu

Current behavior

The segmented control for the views is displayedin the toolbar, although the Scheduler uses a custom toolbar configuration and the Segmented control is not added there.

Expected/desired behavior

Only componentes listed in the toolbar configuration should be displayed

Workaround:

    .k-scheduler-toolbar > .k-toolbar-views-dropdown,
    .k-scheduler-views.k-segmented-control {
        display: none !important;
    }

The issue is a regression starting with 2026.3.811.

Environment

• Kendo/Telerik version: 2026.3.811
• Browser: [all ]

Please investigate this dojo sample:

https://dojo.telerik.com/IjIminuv

Even looking at the built-in Timeline view, one can see that the bottom gap is thinner in every group. However, switching to the TimelineEx view (that sets BottomRowOffset to 0), the problem is obvious...

Please address this computation error in the row-height...

Regards

Bug report

If a Scheduler event's start time is set differently than :00 or :30, the event will be dropped in an incorrect slot when snap is enabled. The start time in the hint is also incorrect.

Reproduction of the problem

1. Open this Dojo example - https://dojo.telerik.com/oSaQUCOp/13
2. Drag the event to 2:00 AM and drop it. Notice that the start time in the hint is also incorrect when the event is over the 2:00 AM slot.
3. Drop the event

Current behavior

The event will be placed at 2:19 AM instead of at 2:00 AM

Expected/desired behavior

The event should be placed at the dropped slot.

Environment

• Kendo UI version: 2024.1.319
• Browser: [all]

Bug report

Reproduction of the problem

1. Run this dojo - https://runner.telerik.io/fullscreen/aKRBlRDR
2. Quickly change the views in no particular order

Current behavior

Occasionally the k-focus class is not cleared from a previously selected view.

Expected/desired behavior

The k-focus class should be cleared

TicketID:

1715639

Environment

• Kendo/Telerik version: 2026.2.520

Bug report

Reproduction of the problem

1. Open the Dojo - https://dojo.telerik.com/tLeSgMPo
2. Create a new event
3. Drag and drop it over the existing one

Current behavior

The events overlap

Expected/desired behavior

The events should be deisplayed one below each other.

The issue is a regression starting with 2023.2.606

Environment

• Kendo/Telerik version: 2026.2.520
• Browser: [all ]

Bug report

In RTL Scheduler dragging of events does not horizontally scroll is not possible

Reproduction of the problem
1. Open this Dojo example - https://dojo.telerik.com/HrVYvFSY

2. Drag the Meetings with Alex event to the left. Scrolling  to non visible slots not possible.

3. Scroll to the left to find an event in the middle of the day, start to drag it, the scheduler scrolls horizontally to the beginning of the day

Expected/desired behavior
Scrolling to the left shall be possible as it is in the non LTR Scheduler

Environment
Kendo UI version: all
Browser: [all]

Bug report

In the Scheduler, if we have a slotTemplate and at the same time views.virtual, the resources().field in the slotTemplate always returns the same value (of the first resource).

Reproduction of the problem

1. Open the Dojo - https://dojo.telerik.com/lJnddiLz

Current behavior

The data-resource='#= resources().user_id #' in the slotTemplate always has the same value.
If the virtual is disabled, the data-resource='#= resources().user_id #' has a value based on the resource.

Expected/desired behavior

The resources should be correctly returned in the slotTemplate even if the virtual option is enabled.

Environment

• Kendo UI version: 2025.3.1002
• Browser: [all ]

Bug report

In Scheduler with Vertical Grouping and mobile:tablet, the cells for the resources and for the events a misaligned. That is observed only in timeline views.

Reproduction of the problem

Open the Dojo example.

Current behavior

The Resources and events cells are misaligned.

Expected/desired behavior

The cells for the resources and the events should be aligned.

Environment

• Kendo UI version: 2020.1.406
• Browser: [all]

Bug report

When all-day event is rendered on more than one day the events in Scheduler are overlapped.

Reproduction of the problem

1. Open the Dojo - https://dojo.telerik.com/yEDWLPir
2. Edit the 'Job Interview - Bobby Rooney` event as follows:

Current behavior

The events have the wrong calculation and are overlapping.

Expected/desired behavior

The event should not overlap:

The issue is a reression starting with 2024.4.1112

Environment

• Kendo UI version: 2025.2.702
• Browser: [all ]

We have a need to be able to provide a dropdown above the scheduler, in order to allow the end user to change the time zone of the scheduler dynamically, even after it has been initialized.  Our team was disappointed that this is currently not possible (http://www.telerik.com/forums/timezone-dropdown), but maybe in the future.  Thanks for reading.

Bug report

Reproduction of the problem

Reproducible in the Events demo.

1. In the AllDay slot click and drag the mouse from Monday to Wednesday.
2. The change event fires 3 times (expected).
3. Click on Wednesday to select only that slot.
4. The change event does not fire.

Also reproducible when selecting the slots from right to left (Wed to Mon) and then selecting the last slot (Mon).

The behavior is identical when selecting slots in a specific day, e.g. selecting and dragging from 8:00 to 10:00 and then selecting the last slot (9:30-10:00).

Current behavior

The change event does not fire.

Expected/desired behavior

The change event fires.

Environment

• Kendo UI version: 2019.2.619
• jQuery version: x.y
• Browser: [all ]

Bug report

In Scheduler event, if the eventTemplate has a table, the add event is triggered when editing an existing task, resulting that both popups open and close instantly.

Reproduction of the problem

Open this dojo example. Choose an event and click the span containing the text "I have some icons here".

Current behavior

The add event popup shows together with the edit event popup.

Expected/desired behavior

Only the edit event popup should be displayed.

Environment

• Kendo UI version: 2019.3.917
• Browser: [all]

Bug report

When the user tries to set a repeat rule for an event, the spinners for the NumericTextBoxes are not displayed

Reproduction of the problem

1. Open the Demo - https://demos.telerik.com/kendo-ui/scheduler/basic-usage
2. Try to edit or create an event and click Repeat Daily

Current behavior

The spinners are not displayed. Also, the calendar icon is not displayed.

The following classes should be applied only to the parent element: k-recur-interval, k-recur-count, k-recur-until

Expected/desired behavior

The spinners and the calendar icon should be visible

The issue is a regression starting with 2023.1.117

Workaround

edit: function(e){

            $('[name="recurrenceRule"] .k-button-group-stretched button').click(function(){               
              $('.k-recur-interval.k-input-inner').removeClass('k-recur-interval')
              $('.k-recur-count.k-input-inner').removeClass('k-recur-count')
              $('.k-recur-until.k-input-inner').removeClass('k-recur-until')
            })

 },

Dojo - https://dojo.telerik.com/@NeliK/iVExeNek

Environment

• Kendo UI version: 2024.3.806
• Browser: [all ]

Bug report

If you resize the DevTools pane after destroying the Scheduler, a "Cannot read properties of null (reading 'getKendoToolBar')" error is thrown.

Regression introduced with 2022.2.621

Reproduction of the problem

1. Open this example - https://runner.telerik.io/fullscreen/UNuJiGIR/5
2. Open the DevTools and resize the pane so that the page would be ~30% width.

Current behavior

An error is thrown after resizing the pane.

Expected/desired behavior

No error should be thrown after resizing the pane.

Environment

• Kendo UI version: 2023.3.1010
• Browser: [all]

Bug report

When a recurring event is created in a Scheduler and the id is not set to the event, then if the event is deleted an error is thrown in the console.

Reproduction of the problem

1. Open the Dojo example.
2. Create a new recurring event
3. Remove the event:
   3.1. Select the 'Delete current occurrence' option
   3.2. Select the 'Delete the series' option

Current behavior

3.1. 'kendo.all.js:311085 Uncaught TypeError: Cannot read properties of undefined (reading 'startTimezone')' is thrown
3.2. 'Uncaught TypeError: Cannot read properties of undefined (reading recurrence exception)' is thrown in the console

Expected/desired behavior

There should be no errors in the console although the deleted event is without id being set. There could be some more descriptive message.

Environment

• Kendo UI version: 2022.2.802
• Browser: [all ]

Bug report

When the mobile option of the Scheduler is set to true and the user double click/double-tap the Edit dialog is opened, but when saving the event, the following error is thrown in the console:

'Cannot read property 'isOccurrence' of undefined'

Reproduction of the problem

1. Open the Dojo example in the emulator.
2. Double click fast to edit or create an event
3. Try to save the event

Current behavior

An error is thrown in the console (screencast)

Expected/desired behavior

There should be no error in the console

Environment

• Kendo UI version: 2020.3.1021
• Browser: [all ]

When no height is set to the Scheduler the grouping does not expand in height to the rendered month views. 

Actual: https://dojo.telerik.com/UhoxowEh

Expected: https://dojo.telerik.com/UPiGosik