Hi Dan,

The bug will be addressed in the next official release, either in a service pack in January or in the official 2026 Q1 release scheduled for February. Please remember to remove the workaround after upgrading your application.

Regards,
Rumen
Progress Telerik

Thank you for taking the time reporting this issue.

The date and time pickers have only partial support for the RTL accessibility mode which is not the expected behavior. This bug will be reviewed and eventually get fixed.

Until a fix is provided, the following example CSS could provide a viable workaround. This overrides the appearance for the Bootstrap Skin and styles the picker to have its button on the left instead.

<style type="text/css">
    body {
        font-size: 14px;
    }
 
    .RadPicker_Bootstrap .RadInputRTL .riTextBox {
        padding-right: unset;
        float: right;
        padding-left: 2.286em;
    }
 
     .RadPicker_Bootstrap .RadInputRTL .rcSelect {
        right: unset;
        left: 1px;
         
    }
 
    .RadPicker_Bootstrap .RadInputRTL .rcSelect {
        border-radius: 4px 0 0 4px;
    }
 
    .RadPicker_Bootstrap .RadInputRTL .rcSelect .rcCalPopup {
        border-left-width: unset;
        border-left-style: unset;
        border-right-width: 1px;
        border-right-style: solid;
    }
</style>

Please accept our apology for any inconvenience this may have caused.