As always, the less code, the better. Don’t throw dozens of libraries for things that should be simple. Keep everything that you can thinner as possible. Stay with this mantra. You’ll never regret!
If you are a judge and want to test my application, you can. However, if the date time picker is not working for you, you have to input the date and time options, manually, in the following format:
Alternatively, you can test using another browser than Google Chrome. For me, in Safari and Firefox the date time picker component is working fine. Go and give it a try! http://railsrumble.com/entries/10-groupgo