I am not using Date.js. Not even sure what that is. I dropped the Kendo.all.js file into my project instead of using many different JS files and it began working. I cannot ship this way when I'm done with development due to the extreme file size of the Kendo.all.js file. So I would like to know what file I am missing or have in the wrong order. But I have not truly solved it yet - just that work around.
Piotr has not replied to me so I doubt he'll answer you. In the meantime if I find the issue I'll update this thread. Please do the same.