Just a mock-up of how I would do it... you'll probably have to do that with all the previously mentioned events though.
---> outside your scheduler but still accessible to it
var today = new Date(milliseconds);
---> events in your scheduler - in this case the edit option...
edit: function (e) {
if (kendo.toString(e.event.end, "fff") < today ) {
e.preventDefault();
}
else {
console.log("Hope that helps?")
}
}
Hope it helps!