### Bug report

When the dateInput option is enabled and the format contains the "ddd" format specifier, the DateTimePicker does not display the date format correctly. Also, when a date is selected, the formatting contains "undefined".

### Reproduction of the problem

1. Define a DateTimePicker with enabled "dateInput" and format equals to "ddd dd/MM/yyyy HH:mm".

2. The format is not correct. When you select a date it is not formatted correctly.

The issue occurs when using the DatePicker, as well.

The last working version is 2023.1.425.

Also, when the "dateInput" is disabled, the date format is displayed as expected.

A Dojo sample for reproduction: https://dojo.telerik.com/oxipADUL

### Expected/desired behavior

The date format must be "day of the week day/month/year hours:minutes" (for example, "Wed 24/01/2024 01:00").

### Environment

* **Kendo UI version: 2023.3.1114
* **jQuery version: 3.7.0
* **Browser: [all]