Well, before worrying about paying people, maybe you could post the relevant snippets of code?
Did you mean a jQuery-UI date picker? If so, while I could dig through some old projects and extra code, one advantage the KO library has over many options is its incredibly stability. That means that answers from 5+ years ago are many times still relevant today, unlike certain frameworks. In general, you can probably find an answer, i.e. a custom binding, for most anything on StackOverflow. In particular, look for answers by Ryan Niemeyer, as they are prolific and can usually be taken as gospel.